MOSCOW, September 5. /TASS/. The number of confirmed coronavirus infections worldwide increased by 25 mln in August which is approximately 5 mln less than the July figures and the COVID-19 ...

MOSCOW, August 25. /TASS/. Repeat coronavirus infection is possible if the antibody titer is at the low level, that is, the presence of antibodies does not guarantee a 100% protection from the ...