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Messenger RNA Covid vaccines 66% effective against Delta: US study
[Article] Le variant delta réduit l'efficacité des vaccins Pfizer et Moderna.
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Messenger RNA Covid vaccines 66% effective against Delta: US study.Washington (AFP) - The effectiveness against infection of the Pfizer and Moderna Covid-19 vaccines dropped from 91 percent before the Delta variant became dominant to 66 percent afterwards, according to a large study of US health workers...
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The Centers for Disease Control and Prevention (CDC) has been examining the real-world performance of the two vaccines since they were first authorized among health care personnel, first responders and other frontline workers © AFP/File Patrick T. FALLON