Coronavirus (CoVid-19) | All You Should Know | Symptoms | Prevention | Effects

Article source: Svalbard Adventure What are Viruses and How They Work?rnThe first human virus was discovered by Walter Reed in 1901. In any case, what is Virus, viruses are everywhere from our surroundings to the very food we eat. We ingest breathe in and take in a huge number of viruses consistently. Viruses are very small, we can't obviously observe them by our naked eyes. Actually, they are little to such an extent that if bacteria had eyes even they wouldn't have the option to see every one of them. Most researchers acknowledge that viruses are not living, They, for the most part, comprise of a shell made of protein which inside contains either DNA or RNA with chemicals for replication and control of their genetic materials. A Virus is in reality only a piece or strand of genetic data, normally DNA or RNA which can be single or double-stranded. This is the viruses genome it utilizes this with the assistance of different sub-atomic machines to repeat itself. It can't do this by itself, it must contaminate a cell. Cells are ideal hosts for viruses furnished with its genetic material. Viruses can taint sound cells and convert them into careless infection creating robots. The virus uses an outer protein coat covered in small molecular receptors to bind and join the membrane of a cell. This is fundamental as it is the thing that figures out which cells an infection can taint.rnWhen joined the infection utilizes a few convoluted natural pathways to constrain the cell to either accept its genetic material or take in the whole infection itself. Once in the cell, the virus will at that point start to utilize its sub-atomic Arsenal to seize the cell's protein manufacturing system and DNA replication system. After the virus has coordinated itself into the cells own DNA, the cell will at that point recreate its DNA and use it to fabricate proteins without the cell. Even realizing it produces viral protein shells filling them with infection DNA adequately making duplicates of the infection.rnThe virus making machine starts to assume control over increasingly more of the cells protein-producing ribosomes, producing a large number of new viruses that rapidly fill the cell. These viruses then cause pressure inside the cell and by a few distinct methods erupts from the cell to contaminate new cells for a similar reason. Appears persevering organic vandalism to me. Viruses are not all harmful, some are being utilized to help reinforce strengthen the disease opposition in crops. While others, for example, HIV are being utilized in relieving and curing certain types of cancers. In any case, what is the most remarkable of everything is that numerous researchers trust some viruses that tainted microscopic organisms billions of years back helped structure the primary cell core. If this is valid, at that point, all complex cell life on Earth descended from a single virus. What is the difference between Virus and Bacteria?rnWhat is the difference between Viral and Bacterial infection?rnViruses and Bacteria are very different. Yes, both of them could ruin your day with coughing, explosive diarrhea, and profuse blood-vomiting. But they substantially differ from each other in size, structure, and biology. Bacteria are cellular creatures of microscopic size. Most of their bodies consist of the cytoplasm, in which a bunch of biochemical processes takes place. These processes together form the actual life of the bacterium and they’re regulated by the genetic material sloshing about in the cytoplasm known as DNA or RNA. To keep the cytoplasm from flowing everywhere, it is surrounded by a membrane. Bacterium feeds from its surroundings and as it becomes fat enough, it divides. Viruses are way more simple. They are dwarves compared to bacteria with their tiny shells only surrounding their genetic material, which can either be DNA. Without cytoplasm, viruses are like dead, nothing happens in them. There are no biochemical reactions, no life processes, the virus doesn’t do anything. But if it doesn’t do anything, how does it reproduce? A virus is like a message in a container. At whatever point it goes over a susceptive cell of a higher life form, it gets picked up, and the cell will read its genetic material. Based on the information in the virus’s genetic material, the biochemical procedures of the cell will begin imitating the virus, which for the most part doesn't bring about a happy ending for the cell. The main difference between the two pathogens is that bacteria are alive, they have their own metabolism, they feed, they reproduce. While viruses don’t strictly speak live, they’re just packaged codes waiting for a host cell to replicate them. Viruses, therefore, rely upon invading other organisms to survive. Some attack people, others prey on animals or plants, even bacteria aren’t safe from them. In the meantime, bacteria can peacefully exist in the soil, in natural waters, in the drain or in leftover hot dogs without causing any trouble. You even carry them on your skin and in your guts and no harm is done to you. Plenty of them cause diseases but we can’t lump them together with viruses, because their biological differences affect our means of combating them. Unless you want to kill the patient as well, you have to target the pathogens specifically. In the case of bacteria, this can be achieved with antibiotics. Antibiotics wreck the special biochemical processes of bacteria making them die. The biochemical processes of the cells of the patient are different enough from those of the bWe can’t pull the same trick on viruses because, if you recall, there are no biochemical processes in viruses. If you’ve ever tried parachuting with an anvil, you have an idea of just how effective antibiotics against viruses are. The biochemical processes of viruses are performed by the host cells during their everyday activity, so we cannot block them without seriously damaging the host and triggering malpractice lawsuits. However, there are antiviral drugs that can block special elements of the host-virus interaction, elements that don’t exist during normal cellular functioning, and therefore will not be missed, such as the act of viral entry into the cell. Antiviral drugs are not good against all viruses and even in cases when they are, they’re not as effective as antibiotics against bacteria. But do not despair, there is another weapon against viruses, I mean, vaccines. They are not for curing viral diseases, though, but for preventing them. Of course, many bacterial infections can be fought with vaccines as well but generally speaking, vaccines are used more often against viruses because, as a rule of thumb, the simpler a pathogen’s structure is, the better vaccines work against it. Viruses and bacteria, although both potential pathogens differ greatly in their structure and their biology calling for different methods of combating them. Why Viruses are called Molecular Hijackers?rnContrary to popular belief, viruses are not alive. They are much smaller and simpler than single-celled organisms like bacteria, and they do not meet most of the criteria that biologists agree are required to call something alive. Living organisms must be able to perform metabolism, making energy from food. Viruses cannot. Life must be able to reproduce out of its own capacity. Viruses do not. They can be considered biologically inert, so viruses exist in between simple molecules and living organisms. So what’s inside a virus exactly? In truth, a virus is pretty much just genetic material in a protein casing. There is no membrane, no organelles, not much of anything we are used to seeing in living creatures. Coronavirus (CoVid-19): All You Should Know | Symptoms | Prevention | Effect Nevertheless, viruses reproduce by injecting their genetic material into a host cell, thereby hijacking the cellular machinery of the cell and forcing it to make copies of the virus instead of what the cell would normally be doing, sort of like pirates on the high seas capturing a large vessel and taking command. Viruses were discovered in the late 19th century when examining certain diseases that afflicted plants. It was found that sap from the plant would transmit the disease even though no bacteria were visible in the sap. When examined with a microscope, and the sap would still transmit the disease even when it was filtered by a process meant to remove any such bacteria. This meant that the agent responsible for transmitting the disease must be way smaller than a single bacterium. But this agent could not be cultivated in test tubes, so it must also be much simpler than a bacterium. Later, as we became able to examine viruses with more sophisticated techniques, we began to realize the structure of the virus, which comes in several forms. Some are rod-shaped or helical, like the tobacco mosaic virus. Some are icosahedral, like an adenovirus. Some have a membranous envelope covered with spikes, like the influenza virus. And some even look like weird little spiders. This is called a bacteriophage, and it is kind of like a rod-shaped and icosahedral virus combined, with some fiber tails. The thing they all have in common is that they carry their own genetic material, which could be double-stranded or single-stranded, and either DNA or RNA. This will typically be found as either a single linear molecule or a circular molecule. The protein shell that encloses the genetic material is called the capsid, which comes in different shapes for different viruses. That’s really all there is to the structure of a virus. So how exactly do they reproduce? As I said above, viruses hijack the machinery of a host cell. This is because they do not have ribosomes or the other components necessary to express genes, so they need a cell to do it for them. Certain viruses can infect certain kinds of cells, and this is due to the system of recognition that must occur between the two. To get inside the cell, a virus must be recognized by surface receptors on the cell. rnFor this reason, many viruses are specific to only a small set of species, or even one individual species, and sometimes even a particular type of cell found within that individual species. Once this recognition occurs, the virus either injects its genetic material into the cell if it’s a bacteriophage, or the virus can be brought inside the cell completely intact through endocytosis.rnOnce inside, the virus disassembles and the viral DNA gets transcribed and translated by all the parts of the cell that are typically busy working for the cell itself. Once there are many copies of the viral DNA, the capsid proteins reassemble and form new viral particles, up to hundreds or even thousands of them, which then exit the cell. Sometimes this process can damage or destroy the host cell, so let’s look at the different mechanisms viral replication can utilize for bacteriophages, as these are the best understood viruses. With the lytic cycle, the host cell is terminated at the end of the replicative cycle. This happens once many viruses have been generated, and the cell bursts open, or lyses, releasing them to then go and infect other cells. Given the exponential nature of this process, just a few successive lytic cycles can destroy an entire bacterial population in a couple of hours. By contrast, with the lysogenic cycle, the host cell is not destroyed. This is because rather than usurping the cellular machinery to exclusively produce viruses, the viral DNA is incorporated into the genome of the cell. We can refer to this kind of viral DNA as a prophage. This DNA remains largely silent, and the cell can divide many times, with each daughter cell also containing the prophage. Then some environmental signals may trigger a switch from the lysogenic mode to the lytic mode, where the prophage returns to the form of a separate circular DNA molecule, and all of the infected cells could lyse at once. Apart from bacteriophages, other viruses have envelopes, which allow them to enter and exit the cell by endocytosis and exocytosis without destroying the cell. So it is of great importance to the virus that it will be recognized by these surface receptors. Other viruses are considered retroviruses, because they contain an enzyme called reverse transcriptase, which transcribes an RNA template into DNA, which is the opposite of normal transcription. There are even smaller infectious agents called viroid’s, which are naked circular RNA molecules that disrupt certainly regulatory systems in plants, and prions, which have no genome, but are instead infectious protein particles that cause other proteins in brain cells to aggregate and bring on disease symptoms, possibly including Alzheimer’s and Parkinson’s disease. It would seem that no cells are safe from viruses. But nature is clever, and bacteria are constantly evolving. Chance mutations in genes that code for surface receptor proteins may result in receptors that no longer recognize a particular virus, so it can no longer enter the cell. Viruses, in turn, mutate at random, and if glycoproteins on a viral envelope become modified such that they will be recognized by the new receptors, they will proliferate anew. In this way, bacteria and viruses are engaged in constant evolutionary flux. The origin of viruses is still disputed, though it is generally thought that viruses came about shortly after unicellular life first evolved, and there are several anomalous viruses that contain up to several thousand genes, including some previously found only in cellular genomes. What is Coronavirus (2019-nCoV)?rnSo the whole family of Coronaviruses is named Coronavirus because corona means a crown, and so this refers to the way that the virus looks under the microscope like there's a crown on the top of the virus. Some of them, four or five different kinds, cause common diseases among humans, everything from the common cold to mild or moderate respiratory illnesses. Other kinds of Coronaviruses affect animals, and sometimes, on rare occasions, we see Coronaviruses jump from animal species into the human population. The 2019 novel Coronavirus is getting a lot of attention now, because it is a new kind of Coronavirus we haven't seen among humans before. The theory is that it may have jumped from an animal species into the human population, and then begun spreading. We have seen many people that are dying of this disease, and we know that there are already thousands of cases. So people are concerned because we don't yet know exactly how severe the disease will be or how far it will spread. When a new virus emerges, we often have to learn much more about it, and one of the things that we question is how does it transmit from person to person? We know that most respiratory viruses are spread by large droplets that come out when people cough and sneeze, and stay aloft usually for about six feet in front of them. They land on surfaces, and then can also be transmitted between person to person by touching those surfaces, such as doorknobs or other surfaces. Other viruses can spread in the air and stay for a longer period in small droplet nuclei. For this current 2019 Coronavirus, we're not yet sure whether it is droplet or airborne transmission. A new analysis found that the virus can remain viable in the air for up to 3 hours, on copper for up to 4 hours, on cardboard up to 24 hours and on plastic and stainless steel up to 72 hours. We need to take protection. We're still learning a lot about this 2019 novel Coronavirus, to understand how dangerous it might be. Right now, the majority of the cases are in China, Italy, and Iran. We know that some travelers have brought the virus to other countries. I think one of the main things to keep in mind is that this is the respiratory virus season, and we have other respiratory viruses like influenza that we need to take precautions. Because we know we have thousands of cases and thousands of deaths every year from influenza. Given the ongoing transmission of the virus in China, Italy, Iran and other countries, we have a travel alert that was issued by the Centres for Disease Control and Prevention. So at this time, until we know more, avoid non-essential travel to any affected area.rnHealth Systems across the world are busy right now preparing to safely identify, isolate, evaluate, and care for patients with 2019 novel Coronavirus. We have the capability of doing this safely by utilizing personal protective equipment, by implementing travel screenings. So that we can quickly identify patients who have risk factors for the disease, and then implementing isolation precautions, the use of personal protective equipment, and other measures to make sure that we limit the spread of the virus. How does Coronavirus affect the human body?rnCoronaviruses (nCoV) are a family of viruses that cause sicknesses like the common cold, as well as more severe diseases, such as Middle East Respiratory Syndrome and Severe Acute Respiratory Syndrome. A novel Coronavirus (nCoV) is a new strain, one that hasn’t previously been recognized in humans. Coronaviruses cause diseases in mammals and birds. A zoonotic virus is one that is transmitted between animals and people. When a virus circulating in animal populations infects people, this is termed a “spillover event”. It is speculated that the 2019 novel Coronavirus, or CoVid-19, originated in bats and was transmitted to humans, possibly with pangolins as an intermediate host. Unfortunately, CoVid-19 is now spreading from human to human as well. CoVID-19 has surpassed the SARS death toll in a matter of weeks. Even though the death rate is much lower, it spreads faster. Early data suggest that in around 82% of cases, symptoms are relatively mild. The illness begins and ends in the lungs. However, the remainder of cases are severe or critical, typically in older or immune-compromised individual. How does CoVID-19 affect the body? The virus is fitted with protein spikes sticking out of the envelope that forms the surface and houses a core of genetic material. Any virus that enters your body looks for cells with compatible receptors as already discussed. Ones that allow it to invade the cell. Once they find the right cell, they enter and use the cell’s replication machinery to create copies of themselves. COVID-19 likely uses the same receptor as SARS – found in both lungs and small intestines. It is thought that CoVID-19 shares many similarities with SARS, which has three phases of attack: viral replication, hyper-reactivity of the immune system, and finally pulmonary destruction. Early on in infection, the Coronavirus invades two types of cells in the lungs – mucus and cilia cells. Mucus keeps your lungs from drying out and protects them from pathogens. Cilia beat the mucus towards the exterior of your body, clearing debris – including viruses! – out of your lungs. Cilia cells were the preferred hosts of SARS-CoV, and are likely the preferred hosts of the new Coronavirus. When these cells die, they slough off into your airways, filling them with debris and fluid. Symptoms include fever, cough, and breathing difficulties. Many of those infected get pneumonia in both their lungs. Enter the immune system. Immune cells recognize the virus and flood into the lungs. The lung tissue becomes inflamed. During the normal immune function, the inflammatory process is highly regulated and is confined to infected areas. However, sometimes the immune system overreacts, and this results in damage to healthy tissue. More cells die and slough off into the lungs, further clogging them and worsening pneumonia. As damage to the lungs increases, stage three begins, potentially resulting in respiratory failure. Patients that reach this stage of infection can incur permanent lung damage or even die. We see the same lesions in the lungs of those infected by the novel Coronavirus as those with SARS. SARS creates holes in the lungs, so they look honeycomb-like. This is probably due to the as before mentioned over-reactive immune response, which affects tissue both infected and healthy and creates scars that stiffen the lungs. As such, some patients may require ventilators to aid breathing. The inflammation also results in more permeable alveoli. This is the location of the thin interface of gas exchange, where your lungs replace carbon dioxide in your blood with fresh oxygen you just inhaled. Increased permeability causes fluid to leak into the lungs. This decreases the lungs’ ability to oxygenate the blood, and in severe cases, flood them so that you become unable to breathe.rnSometimes, this can be fatal. The immune system’s over-reaction can also cause another kind of damage. Proteins called cytokines are the immune system’s alarm system, recruiting immune cells to the infection site. Over-production of cytokines can result in a cytokine storm, where there is large-scale inflammation in the body. rnBlood vessels become more permeable and fluid seeps out. This makes it difficult for blood and oxygen to reach the rest of the body and can result in multi-organ failure. This has happened in the most severe cases of CoVid-19. Although there are no specific treatments for Coronavirus es, symptoms can be treated through supportive care. Also, vaccines are currently in development. What can you do to protect yourself from CoVid-19? Advisories vary in different countries, but the basic protocol comes down to regular hand washing, avoiding close contact with anyone coughing or sneezing, avoiding unnecessary contact with animals, washing hands after contact with animals, thoroughly cooking meat and eggs before consumption, and covering your mouth and nose while coughing or sneezing. Respiratory viruses are typically transmitted via droplets in sneezes or coughs of those infected, so preventing their travel stops the spread of disease. What are the Symptoms of Coronavirus (CoVid-19)?rnAt first, you might think it's cold and it could be but CoVid-19 could escalate. Here's what you need to know according to the World Health Organization on CoVid-19. As of now, 80 % of laboratory-confirmed cases were mild to moderate 14% were severe and 6% were critical just to be clear a mild case of CoVid-19 is not like a mild cold. The symptoms will still be pretty severe anything less than needing oxygen puts you in this category. Severe cases do need supplemental oxygen and critical ones are defined by respiratory or multi-organ failure. The symptoms of treatments and timelines of having the disease vary depending on which category patients fall into. So let's break down what having CoVid-19 looks like. Day to day for each level of severity it can take as few as 2 or as many as 14 days after being exposed to the novel Coronavirus for the first symptom to develop. This is when it might feel like a cold or the common flu many patients develop fever early on. The World Health Organization China joint mission saw that about 88 percent of people who had CoVid-19 had a fever. Another study out of China showed that while only 44 percent of patients had a fever on admission to a hospital 89 percent eventually developed one, but there have been some cases that led with gastrointestinal symptoms diarrhea, nausea vomiting and/or abdominal discomfort may appear a couple of days before respiratory symptoms.rnThis isn't the norm though because CoVid-19 is a respiratory disease that means for most patients the virus will start and end with the lungs. In the early days of infection, the virus invades lung cells specifically this can damage the cilia the hair-like projections, that move around to keep Airways clear of mucous and debris. When cells get infected they die and shed off adding to the debris and hindering your body's ability to keep stuff out of the lungs and trachea. rnThe inflammation causes damage and damage causes more inflammation and this cycle could continue until there's no healthy tissue left and inflammation might explain why a dry cough is one of the most common symptoms. The same goes for shortness of breath and phlegm production. Other symptoms that can appear around this time are fatigue, sore throat, headache, joint or muscle pain, chills and a runny nose by day five patients with pre-existing conditions might find that they have trouble breathing and it usually takes about seven days for a person to go to a hospital. Mild cases though usually clear up by this time but those with moderate to critical cases will have developed pneumonia which can range from non-life threatening to severe.rnRecovery time for these patients could be anywhere from a few days to weeks for some severe and critical cases though symptoms can escalate into acute respiratory distress syndrome. An RDS is an illness that happens when fluid builds up in the lungs inflammation triggers a flood of immune cells that are meant to target the infection. They’re usually isolated to infected areas but sometimes the body goes overboard which is when the immune cells start killing anything in their path including healthy cells as already discussed. An RDS is often fatal in critical cases it can lead to respiratory failure requiring advanced life support and this is most likely when patients head to the ICU. That's the cause of most CoVid-19 deaths and even when a patient survives this phase they could be left with permanent lung damage. SARS punched holes and some infected people's lungs giving them a honeycomb effect and these lesions have been seen in people affected by the novel Coronavirus too.rnEarly studies found that most people who die of the disease will do so within 14 to 19 days and on average people who recover are released from the hospital after two and a half weeks. But with the recovery of the most critical case could take months. Once a patient is in the recovery period it's possible that they could still be contagious, these people should work with their doctors and public health officials to determine when they're no longer a risk. As of now, there is no vaccine for the virus so the best way to avoid getting sick is to avoid being exposed. CoVid-19 should be taken seriously but most cases are survivable so stay home stay clean and don't panic. How to Protect Yourself Know-How it SpreadsrnThere is currently, no vaccine to prevent Coronavirus disease in 2019 (COVID-19).rnThe best way to prevent illness is to avoid being exposed to this virus.rnThe virus is thought to spread mainly from person-to-person.rnBetween people who are in close contact with one another (within about 6 feet).rnThrough respiratory droplets produced when an infected person coughs or sneezes.rnThese droplets can land in the mouths or noses of people who are nearby or possibly be inhaled into the lungs.rnTake steps to protect yourself Clean your hands oftenrnWash your hands often with soap and water for at least 20 seconds, especially after you, have been in a public place, or after blowing your nose, coughing, or sneezing.rnIf soap and water are not readily available, use a hand sanitizer that contains at least 60% alcohol. Cover all surfaces of your hands and rub them together until they feel dry.rnAvoid touching your eyes, nose, and mouth with unwashed hands. Avoid close contactrnAvoid close contact with people who are sickrnPut distance between yourself and other people if COVID-19 is spreading in your community. This is especially important for people who are at higher risk of getting very sick.