[“I have yet to see a definitive case of reinfection reported in the scientific literature [to date]. To truly prove reinfection, and discriminate from prolonged viral shedding related to the first infection, would require sequencing of both the first and second viruses and demonstration that the two viruses are genetically different,” he said, adding it will also be important to look at symptoms and how long reinfection lasts.
“It is also important to recognise that documentation of one or a handful of reinfections does not prove that this is a common, epidemiologically important event.”
What happened in South Korea, where patients tested positive after having recovered from Covid-19?
This initially caused concerns, as experts feared the results might suggest patients had been reinfected. However, the World Health Organization has since said the results were actually false positives, a result of the test picking up particles of the virus within dead lung cells – but this is not active virus. That’s because the PCR (or “have-you-got-it”) test is based on detecting genetic material from the virus – on its own it does not reveal whether that virus is active, and infectious, or not.]