Health
Reinfection in COVID-19- Part two – Pursuit
What do cases of reinfection tell us about protective immunity against SARS-CoV-2 asks the University of Melbourne’s Prof Peter Doherty?

Professor Peter Doherty AC
Last week we looked at a well-documented case of reinfection (see Reinfection in COVID-19 – part one) with SARS-CoV-2. A Hong Kong resident who had COVID-19 and developed some symptoms tested positive again 142 days later when checked by PCR at the airport on his return from a business trip to Europe.
That was not too concerning as he remained asymptomatic following the second experience, which clearly boosted his immunity. But what does it tell us about protective …
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