The first cases of reinfection are emerging in Hong Kong, the United States and Europe. There is growing evidence that immunity to the new coronavirus after infection may be short-lived. Following reports in Hong Kong that a man had contracted the virus for a second time just over four months, experts are now saying there is likely only a slim possibility of people being re-infected with COVID-19, but nobody knows for sure. They suggest immunity from the disease does not necessarily last long. So much for herd immunity, or full immunity. Concrete answers are vital in developing a vaccine, that is, if we ever get one. Subscribe: https://www.youtube.com/user/deutschewelleenglish?sub_confirmation=1 For more news go to: http://www.dw.com/en/ Follow DW on social media: ?Facebook: https://www.facebook.com/deutschewellenews/ ?Twitter: https://twitter.com/dwnews ?Instagram: https://www.instagram.com/dw_stories/ Für Videos in deutscher Sprache besuchen Sie: https://www.youtube.com/channel/deutschewelle #Coronavirus #Immunity #Antibodies