https://theconversation.com/heres-why-you-might-need-a-4th-covid-vaccine-dose-this-winter-177811
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3/16/22 at 12:08am
Organization
The Conversation Africa
Author
Nathan Bartlett
COVID cases are predicted to rise as we face another variant. So a 4th shot to top up our immunity is looking more likely as we head into winter.
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