But scientists say any short-term protection against infection is likely to fall away quickly.
Source: US News and Business Report -usnewsandbusinessreport.com- BBC Breaking
Covid: Fourth-dose jab trial shows good boost
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But scientists say any short-term protection against infection is likely to fall away quickly.
Source: US News and Business Report -usnewsandbusinessreport.com- BBC Breaking
Covid: Fourth-dose jab trial shows good boost