But why?
Natural immunity discussed by Mr. Bill Gates

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Sadly the virus itself

particularly the variant called Omicron

is a type of vaccine, creates both B cell and T cell immunity

and it's done a better job of getting out to the world population than we have with vaccines.

Serosurvey in African countries, 80% positive

Chance of severe disease, dramatically reduced because of that infection exposure.

We didn’t do a great job on therapeutics

UK

Cases down dramatically, infections down slightly

https://coronavirus.data.gov.uk/detai...

https://covid.joinzoe.com/data#levels...

ONS tracks omicron BA.2