Covid-19 : Cured patients do not necessarily have immunity

Some patients who have been infected with the new coronavirus have developed antibodies. However, this response does not protect them from a second infection. A study conducted on a group of people who recovered from Covid-19 shows that only 1% of the cured patients had levels of antibodies that were high enough to neutralize the virus.

Researchers from Harvard did research on macaques. A month later, the monkeys were re-infected and did not get sick, although they did not develop antibodies. Further research has also shown that only a certain type of antibodies, of all those produced can prevent the virus from entering cells, Slate wrote.

For its part, a new study from King's College London (KCL) has shown a sharp drop in the antibody levels of patients three months after infection. Sometimes antibody levels have gone undetectable, suggesting that in the first months following their recovery, patients are more prone to re-infection.