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Covid-19 and few important Questions ??

Covid-19 and few important Questions

Scientists around the world have put in unimaginable efforts, but there are still many things that we still haven't figured out; and now, we and the entire earth have become part of a large experiment looking for relevant answers.

Here are some of those questions that are still pending:

 How many people are infected?

This is one of the most fundamental issues and the most decisive.

There are already hundreds of thousands of confirmed infections worldwide, but this is only part of the total number of infections. What further blurs the numbers are asymptomatic cases-these people have the virus but do not feel sick.

A virus antibody test will let researchers know whether a person is carrying the virus, and only then can we know how far and how easy the new coronavirus spreads.

 How deadly is it?

It is impossible to determine its mortality until we know exactly how many cases there are.

Current estimates are that about 1% of people infected with the virus will die, but if there are a large number of asymptomatic people, the mortality rate may be lower.

 Complete range of symptoms
The main symptoms of the new coronavirus are fever and dry cough-these are things you should pay close attention to.

In some cases, sore throats, headaches, and diarrhea have been reported, and there are increasing speculations that some people will lose their sense of smell.

However, the most important question is whether mild cold-like symptoms, such as a runny nose or sneezing, will appear in some patients.

Studies have shown that the possibility of people being infected without knowing that they carry the virus exists.
 Transmission of the virus and children
Children are certainly infected with the virus, but most of them have only mild symptoms, and there are relatively few deaths among children compared to other age groups.

Children are usually super-spreaders of the disease, partly because they are mixed with many people (often in children's playgrounds); however, it is unclear what role children play in its spread.

 Where did it come from?

The virus appeared in Wuhan, China, at the end of 2019, when a large number of cases appeared in a wildlife market.

This coronavirus is officially called "Sars-CoV-2" and is very similar to some bat-infected viruses, but the virus is believed to be transmitted from bats to an unknown species before being transmitted to humans.

This "unknown link" remains unanswered and may be the source of further infections.

 Will there be fewer cases in the summer?

Colds and flu are more common in winter months than in summer, but it is not known whether warm weather will affect the spread of the virus.

UK government scientific advisers have warned that it is unclear whether seasonal transmission will occur. If anything, they think it will be smaller than colds and flu.

If the number of new coronavirus infections declines sharply in the summer, there is a risk of a sharp rise in the winter. In this case, the hospital will have to deal with the new crown virus while dealing with the usual large number of winter norovirus patients.

 Why do some people have more severe symptoms?

COVID-19 is mild for most people, but about 20% of people develop further into a serious disease. Why is it so?

The patient's immune system status seems to be a factor, and there may also be some genetic factors. Understanding these issues may help to find ways to prevent patients from entering conditions that require intensive care.

 How long does immunity last, and will you get a second infection?

There is much speculation about the persistence of viral antibodies, but little evidence.

If the patient can successfully recover from the virus, an immune response is bound to develop. However, since the disease has just emerged for a few months, no long-term data are currently available. There have been rumors that the patients were infected twice, possibly due to an error in the test, and they mistakenly assumed that they had no virus.

Questions about immunity will be a key factor in understanding how the virus will develop in the long run.

Does the virus mutate?

It is common for viruses to mutate, but changes in the genetic code of most viruses do not bring about major changes.

By convention, you would imagine that viruses will become less and less lethal in the long-term evolution, but this is not absolute.

The fear now is that after the virus mutates, the immune system may no longer recognize it, so specific vaccines no longer work (as is the case with influenza viruses).

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