One has some #immunity, but just how much and for how long are significant unanswered questions.
There is evidence that reinfection is unlikely for at least 90 days, even for people with a mild case of #COVID-19. That is how long New York City researchers found stable degrees of protective antibodies in the research of nearly 20,000 patients of the Mount Sinai Health System.
Reinfection so far happens to be rare. The most widely known example is that researchers in Hong Kong said a man had mild COVID-19 and then months later was infected again but showed no symptoms. His second infection was detected through airport testing, and researchers said genetic tests revealed slightly different strains associated with the virus.
It evidences the individuals’ disease fighting capability worked as it should. Very few #diseases leave people completely immune for life.
Antibodies are just one piece of the body’s defenses, and so they naturally wane in the long run. Moreover, often, “memory” immune cells can identify germs they previously encountered to fight them better the 2nd time around. Which will help make any repeat infections less severe.
Scientists are studying the way the other areas of the immunity system kick in with all the coronavirus.
It is unknown whether individuals who have been reinfected but show no symptoms could spread the virus to others. That is why health authorities say even those that have recovered from COVID-19 need certainly to wear a mask, keep their distance, and practice good hygiene.
Does a flu shot reduce my chances of getting COVID-19? https://journalstar.com/news/national/does-a-flu-shot-reduce-my-chances-of-getting-covid-19-and-more-questions-answered/article_e6118375-b4c7-500f-9541-b9d1c8c866a2.html