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A person can develop natural immunity against COVID-19. It is for this reason that there are cases in which someone in a family is sick and someone is not infected.
About this in an interview with “RBK-Ukraine” set Director of the Institute of Biochemistry of the National Academy of Sciences of Ukraine Sergey Komissarenko.
“Perhaps this natural immunity developed against coronaviruses that a person was previously ill with,” – the specified specialist.
According to, people get sick with seven types of coronavirus.
“Four are those that annually cause us acute respiratory diseases, they happen quite easily and sometimes we don’t pay much attention to them. And three are extremely dangerous. This is the first SARS-CoV from 2002-2004, MERS-CoV from 2012 and the latest is SARS-CoV-2 “, added.
Komissarenko noted that people can have cross immunity: immunity against the less dangerous types of coronavirus. This immunity allows the immune system to protect a person from the latest type of virus.
“People can have a powerful immune system. It depends on many factors: genetics, nutrition, fatigue, etc. If a person has a strong immune system, he can fight a virus that has entered his body, for example, from those people who they live next to him ” added.
In conclusion, the expert emphasized that there is a category of people who will never contract a virus, but can simply be distributors.
Remember that in Ukraine recorded a sharp decrease in the number of new cases of the disease.
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