WHO officials say it's unclear whether recovered coronavirus patients are immune to second infection https://www.cnbc.com/2020/04/13/who-officials-say-its-uncl

WHO officials say it's unclear whether recovered coronavirus patients are immune to second infection https://www.cnbc.com/2020/04/13/who-officials-say-its-unclear-whether-recovered-coronavirus-patients-are-immune-to-second-infection.html https://www.cnbc.com/2020/04/13/who-officials-say-its-unclea... "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 who had a strong antibody response were immune to a second infection is 'a separate question,' she added."