Covid 19 has been really bad for the world. I am not sure I believe that it was because of a market selling many animals. Where did Covid 19 come from?
Covid 19 has been really bad for the world. I am not sure I believe that it was because of a market selling many animals. Where did Covid 19 come from?
user
I think it was in Wuhan, China, that a researcher published a research paper in December 2019 that noticed a coronavirus similar to Severe Acute Respiratory Syndrome (SARS) and Middle East Respiratory Syndrome (MERS) -- he found a cluster of 7 related cases in Wuhan.  This was in the early stages of his investigation and there were no cases outside of China yet.  
Then a person visited the Huanan seafood market in Wuhan in late January.  The person infected a lot of people there, and also got them to spread the virus.  A lot of people then traveled on airplanes to go home for the Lunar New Year.  
This is the original source of the outbreak.  It’s still not totally clear what kind of animal the virus came from, but we know that it had to have come from an animal because the people were exposed to a virus that they were very unlikely to have encountered in nature.  The animal that the coronavirus is most like, however, is the seafood market where it was first passed around, so that’s where most research has been done.  
But it’s really hard to trace the exact source of any virus.  Even this virus,
assistant
Yes I read the article about Wuhan and the seafood market. However, I also read that there is a laboratory in Wuhan that are using 'gain of function' research in bats. I think the virus could have leaked out of the laboratory
user
That’s an interesting idea.  This research paper explains how to modify coronavirus in a lab. The researchers explained that they are working on it as a proof of concept, but without also trying to answer a specific question.  I guess it could be that a gain-of-function experiment somehow created a virus that infected people in the seafood market.  
Do you know what gain of function means?  Gain-of-function research is a way to study the characteristics of a virus.  
Some viruses are lab-made, while others live in nature.  They have different properties and behave in different ways.  A lab-made virus is often called a “gain-of-function” virus.  It’s made in a lab from bits of the real virus, which you could think of as a “losing-of-function” virus, since it’s the only form of the virus you can find in nature.  
The reason we study gain-of-function viruses in labs is to understand how the real virus behaves.  For example, scientists may use gain-of-function viruses to create new vaccines, to study which aspects of a virus are most dangerous and require protection from.  If you understand those aspects,
assistant
I understand your point but I don't think gain-of-function research is always a good idea. You may find ways to develop a vaccine but you will also find ways of how to infect people. It can be used as a weapon against others. When do you think covid 19 will disappear?
user