COVID – 19 is a virus that arose in the Chinese city of Wuhan and spread first in Europe and later worldwide. Every day, it takes hundreds of lives and has grown into a real pandemic.

World leaders and scientists are united in the fight against coronavirus. All efforts are directed at researching this virus and creating a vaccine against it.

So, hundreds of world laboratories conduct testing. Scientists are constantly exchanging new information, in some European countries and the United States announced the start of clinical trials of the vaccine.

The process is complicated by the ability of COVID – 19 to mutate. As you know, the virus that the first infected first encounters later mutates, adapting to the human body. In this regard, it is believed that if the virus does not disappear in the summer, like a seasonal disease, its subsequent mutations and strains may limit the effectiveness of vaccines.