A case of Covid-19 in Victoria is being treated as a rare case of reinfection, the first case classified as such in Australia. Reinfection with Covid-19 is rare, with only a six cases reported among the 40m cases worldwide to date, including in the US and Hong Kong. It seems that in most cases of Covid-19, people develop immunity to the virus after being infected, though it is still unclear how strong this immunity is or for how long it remains.

 

 

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