For older Americans, the pandemic still poses significant dangers. About three-quarters of Covid deaths have occurred in people over 65, with the greatest losses concentrated among those over 75.
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.
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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