World Health Organization Director-General Tedros Ghebreyesus stressed that it is impossible to predict further mutations of the coronavirus. But everyone has the ability to protect themselves against new strains through vaccination.
Each new mutation of the coronavirus weakens the protective power of vaccines made on the basis of the Wuhan strain. If during the initial versions of the coronavirus they provided protection against infections at a level above 90%, now it can fall below 50%. But the most important thing is that after vaccination, information about the coronavirus already appears in the human body. So when he becomes infected, the disease will not be completely new, and the body will meet it head-on with the help of existing antibodies and immunity T-cells. This means that the reaction to the disease will be much less pronounced and harsh.
Tedros Ghebreyesus stressed that it is impossible to predict the evolution of the coronavirus, but it is possible to protect yourself from a severe form and death with the help of regular revaccination. This is all the more important for people in high-risk categories, including the elderly and immunocompromised patients. A recent study showed that the relatively mild Omicron strain is merciless to older people.
The death rate among the elderly during the last wave provoked by the Omicron strain was quite high this winter – it exceeded similar figures in the winter of last year. And this was largely due to the fact that elderly citizens who had been vaccinated more than 6 months ago were not revaccinated. (READ MORE) 
Tedros Ghebreyesus Medicine Secretary General of the World Health Organization