“Unfortunately, 17% of people with confirmed coronavirus infection do not develop antibodies,” he said at a press conference “Vaccination against COVID-19.

Myths and Reality ”RIA Novosti.

On January 28, 19,138 more people were diagnosed with coronavirus infection in Russia per day. 

Earlier, the chief physician of the Moscow city polyclinic №2 Natalya Shindryaeva, in an interview with Vechernaya Moskva, told in what cases it is necessary to take an antibody test.