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.
The Victorian case is less clear. Genomic sequencing has not yet been completed, but the premier Daniel Andrews said the man first tested positive to the virus in July. He tested positive again in October. In many cases it is unclear whether a second positive test is truly a reinfection or merely dead virus being shed.
Andrews announced the possible reinfection on Wednesday saying the man was being treated as a reinfected case “out of an abundance of caution”