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COVID vaccination in pregnancy may benefit both moms and infants --Canadian study

Pregnant women can reduce their infant's risk of COVID-related hospitalization by receiving at least two doses of an mRNA vaccine, which are highly effective against maternal Delta variant infection and moderately effective against maternal and infant Omicron infection, suggests a study published yesterday in BMJ. A third (booster) dose offered added protection against Omicron.

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Two-dose COVID vaccine is effective against severe Omicron but less so for those over 80 -- Hong Kong study

Two-dose COVID vaccine efficacy durable against severe Omicron but drops in elderly

 

Overall two-dose vaccine effectiveness (VE) against Omicron variant-related hospitalization or death remained above 70% for at least 6 months among adults in Hong Kong but dropped to below 62% in those aged 80 and older, necessitating a third dose, finds a case-control study published today in JAMA Network Open.

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