Trying to find out how long immunity lasts: ICMR Director about Coronavirus

"We have read the report on re-infection of one case in Hong Kong. It can depend on several factors. It could be related to the patient's immune status, it could also depend on the virus - whether the virus has mutated. We need to closely follow it up, but at the same time, we don't need to be alarmed," - ICMR director said in a media briefing.