From CNBC:
World Health Organization officials said not all people who recover from the coronavirus have the antibodies to fight a second infection, raising questions as to whether or not patients develop immunity after surviving Covid-19.
“With regards to recovery and then re-infection, I believe we do not have the answers to that. That is an unknown,” Dr. Mike Ryan, executive director of WHO’s emergencies programs, said at a press conference at the organization’s Geneva headquarters on Monday.
A preliminary study of patients in Shanghai found that some patients had “no detectable antibody response” while others had a very high response, said Dr. Maria Van Kerkhove, WHO’s lead scientist on Covid-19. Whether the patients that had a strong anti-body response were immune to a second infection is “a separate question,” she added....MORE
