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For unvaccinated, re-infection by SARS-CoV-2 likely: Study

The team analysed known re-infection and immunological data from the close viral relatives of SARS-CoV-2 that cause "common colds" -- along with immunological data from SARS-CoV-1 and Middle East Respiratory Syndrome. Leveraging evolutionary principles, the team was able to model the risk of Covid-19 re-infection over time.

Pak bans air travel for unvaccinated people

A day after Prime Minister Imran Khan warned about the spread of the Delta variant, Asad Umar, who also heads the NCOC, on Friday admitted that the fourth wave had set in and issued new guidelines to check its spread.