High antibody titer is not a guarantee from re-infection COVID-19. About this Russian immunologist, Candidate of Medical Sciences Nikolai Kryuchkov told in an interview with Radio Sputnik.
According to the expert, the probability of re-infected with those who have moved COVID-19 and vaccinated is really declining, but this does not mean that they cannot get sick again.
“protect special cells of the immune system with protective functions, as well as protective antibodies, that is, not all antibodies. Most of the most, at least a significant proportion of antibodies does not have the protective properties,” said Russian specialist.
The doctor explained that antibodies without protractive functions do not affect the infectious process, since they cannot neutralize the virus. Therefore, an important factor is the titer or the proportion of protective antibodies.
hooks stressed that the protection measures cannot be neglected even to those who made the vaccination from COVID-19 or suffered this disease. Vaccination or already transferred coronavirus “zero” the likelihood of getting sick medium or hard, but the risk of re-infection remains.
Immunologist said that people who are diagnosed with the primary or secondary immunodeficiency are most of all re-infection with coronavirus infection. For example, those who take immunosuppressive drugs. In addition, the immune response decreases with autoimmune, oncological, severe chronic diseases. He also added that the reactivity of the immune system is reduced in the elderly.