That's a good question. The fact is that new viruses are forming all the time. That means we cannot even know what kind of virus causes the next pandemic virus. The virus that causes the next international epidemics is most probably coronavirus.
The reason for that is that coronaviruses are the most common virus-type that travels through the air. The structure of that virus type makes it very resistant to chemicals that can destroy its genomes. The thing that we must realize is that the next pandemical virus might be advancing in some jungle. And there are lots of people, who cannot go to tests and who don't even care about their health.
If there is no ability to make the tests of infected people there can be many viruses in some areas. And the thing that makes the respiratory tract infections very hard to separate. The first symptoms of those virus infections are always similar. But lethal infection starts to separate from the "harmless infections" soon.
The problematic thing is there are people. Whose immune defense is passive or it cannot fight against viruses and bacteria. For those people who have AIDS or some other reason, their immune system is not working all kinds of infections are dangerous.
The thing that activates the immune system is the antigens of the virus. If the researchers can predict the form of those antigens they could make vaccines before the epidemics start. But the problem is that there are maybe thousands. Or even millions of viruses and their variants all around the Earth. And that makes the creation of the vaccines against every each of them impossible. When a virus will infect the new cell line or cell group it connects some parts of the genomes of those cells in its DNA or RNA.
And this means the transformation of the viruses is incredible. The transformation means. Sooner or later, the vaccines lose their power because the surface antigens of the virus are chanced. And that means the immune system cannot detect those new variants of the original viruses. And that means the creation of the new vaccines must begin.
What caused this pandemic? The fact is that the viruses are sometimes escaping and infect people during normal vaccine research. During the testing, there is always possible that the living viruses are slipping into the test animal or infect personnel who are working in the laboratory. The origin of the COVID-19 remains unknown.
The key question is when those animals that transmit viruses to people got the virus? Are they brought from Africa? Or if they are local what transferred those viruses to the animals that transfer them to humans?
Maybe some Chinese serviceman accidentally brought it from Africa. Or maybe somebody sold infected animals in the marketplace accidentally. I don't know what kind of inspections are made on those animals. And if somebody made a mistake in the secretive laboratory in China. That person would not confess that thing.
Maybe that virus came to China with tourists or some Africans have sold the animals that infected people from Africa outside the customs. In that case, there was no veterinarian's inspection when somebody brought those infected animals to the country or the marketplace. Nobody knows where those animals got that virus. And that information would help to find out the origin of that pandemic.
()https://scitechdaily.com/could-future-covid-variants-fully-dodge-our-immune-system/
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