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US study: Pfizer, Moderna 90% effective after 2 doses in real world
A US study has found that the COVID-19 vaccines developed by Pfizer and Moderna are 90% effective in preventing COVID-19 infection in a real-world setting.
A US study has found that the COVID-19 vaccines developed by Pfizer and Moderna are 90% effective in preventing COVID-19 infection in a real-world setting.
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