Dead lung cells after recovering from disease can give a positive result when re-tested.
A repeated positive coronavirus test in people who are considered cured is caused by dead lung cells, said Maria Van Kerchove, head of the World Health Organization (WHO) new diseases unit, writes ABC News.
According to her, in some patients after a negative reaction to COVID-19 in a week or two, or even later, the disease can be detected again.
“When the lungs recover, there are dead cells that during the test show a positive reaction. This does not indicate an infectious virus, this is not reinfection, this is not reactivation, it is actually part of the healing process. It’s really interesting,” Van Kerkhove explained.
Moreover, WHO experts still do not know whether the presence of COVID-19 antibodies in the human body indicates immunity to a new disease.
“Does this mean that they have strong protection against re-infection? And if so, how long does it last. We still do not know the answer,” the expert added.
According to recent reports, the total number of people infected in the world has reached 3 356 205.
Recall, scientists called a possible cause of the “re-infection” of coronavirus.