“This is a category of people who were usually seriously ill with COVID-19, deeply elderly or with severe chronic diseases,” he said in an interview with URA.RU.

Kryuchkov added that after recovery in such patients, weakness and disturbances in the functioning of the heart, brain activity, nervous system or psyche remain.

“And the worst thing is that it is progressing, and the body cannot compensate for it.

Especially if the person is not undergoing intensive treatment, ”the specialist noted.

Kryuchkov said that after three or four months, a person may die from problems with the cardiovascular system: stroke, heart attack or blood clot separation.

Earlier, Sergei Voznesensky, associate professor of the Department of Infectious Diseases at the Peoples' Friendship University of Russia (RUDN), told which patients with COVID-19 have a higher risk of rapid death.