Scientists found that levels of antibodies that can destroy the virus peaked about three weeks after the onset of symptoms then swiftly declined.
In the study, scientists analyzed the immune response of more than 90 COVID-19 infected patients and healthcare workers at Guy's and St Thomas' NHS foundation trust. They found that the presence of antibodies that can destroy the virus peaked about three weeks after the onset of symptoms and then swiftly declined. Furthermore, blood tests revealed that out of the 60 percent of people had a 'potent' antibody response at the height of their battle with the virus, only 17 percent retained the same potency three months later. Antibody levels fell as much as 23-fold over the period. In some cases, they became undetectable. The study primarily indicates that antibody levels rose higher and lasted longer in patients who suffered from severe cases of COVID-19. Scientists say this could be because patients who are more severely affected by the virus, produce more antibodies to fight the infection.
The immune system has multiple ways to fight the coronavirus. Still, if antibodies are the primary defense line, the findings suggested people could become reinfected in seasonal waves and that vaccines may not protect them for long. The declining trends in the level of antibodies to combat COVID-19 suggest that natural immuno response to the virus might not be as effective in the future, or it could even be lost forever. This study has been submitted to a journal but has yet to be peer-reviewed.
The COVID-19 pandemic has given rise to a lot of potentially dangerous misinformation. For reliable advice on COVID-19 including symptoms, prevention and available treatment, please refer to the World Health Organisation or your national healthcare authority.