Coronavirus is a very common human virus; the main animal hosts are mammals and birds. About 10% of the common cold is caused by a coronavirus, but because the symptoms are very light, it has not been taken seriously.
SARS virus is a kind of coronavirus, which should be transmitted to human beings through a certain animal host, and it is highly toxic. The novel coronavirus, which is the second most virulent MERS in the Middle East, is the third new Wuhan coronavirus.
Here are 3 common knowledge about viruses. They are all commonplace. I hope they can help you better understand the scientific principles of viral diseases and reduce unnecessary panic.
01 virus is different from chemical poison
Chemical poisons are dead. If you touch them at any time, you will be killed. But the virus is alive. Only a living virus is dangerous.
Different viruses have different resistance to environmental factors. For example, HIV and hepatitis B virus will die soon after leaving the protection of body fluids, thus losing the ability to infect. This is why general physical contact (such as holding hands and hugs) between healthy people and these two types of patients will not lead to infection.
On the contrary, the common cold virus and the influenza virus can survive in the air for a period of time, so the infectivity of the cold is so high.
The survival ability of SARS and MERS in the air is lower than that of the common cold virus, so most of the infections occur in close contact.Read More.