“The most contagious person is two days before the onset of symptoms and on the first day of illness.
On average, a person becomes infectious three to four days before the onset of symptoms (rarely seven days) and during the first five days of illness, ”RIA Novosti quoted her as saying.
Pshenichnaya noted that after this period, the probability of transmission of the virus is low.
Earlier, Doctor of Medical Sciences Anatoly Altstein assessed the immunity of some people to COVID-19.