Scientists of St. State University Large -scale analysis results publish In the global biosafety magazine.
Biologists and doctors of St. State University This is below the value of 90 % 95 percent necessary for the formation of sustainable collective immunity.
Kor is considered one of the most infectious viruses: a patient can infect up to 18 people. Despite the effectiveness of the vaccine, the protection may decrease over time, especially in people who are not sick in childhood. In the Soviet Union, mass vaccination began in 1967, but a part of the adult population may not be protected today.
According to researchers, it is especially important to control the situation against the development of international movement, because there is a risk of increasing viruses from countries with disordered epidemiology.