Why COVID-19 reinfection is becoming increasingly common

Almost a third of people who’ve had COVID-19 won’t have natural immunity to reinfection, an epidemiologist says.

It comes as more people record their second infection with the coronavirus.

Professor Adrian Esterman, Epidemiologist from the University of South Australia, the emergence of new variants meant the genetic make-up of the virus was constantly changing.

“Up to 30 per cent of people never get natural immunity,” he said.

“It’s usually because they’ve had a weak infection the first time.”

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