It is not clear from South Korea's data how long protection against COVID-19 from a single shot lasts or the severity of illness it stopped.
Worshippers wearing face masks have their temperature taken as they attend a prayer ceremony entitled overcoming and healing the COVID-19 coronavirus'...
https://www.businessinsider.com/one-shot-pfizer-astrazeneca-coronavirus-vaccine-effective-south-korea-2021-5#Insider
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