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Two-dose COVID vaccine is effective against severe Omicron but less so for those over 80 -- Hong Kong study
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Mon, 2023-02-06 18:00 — mike kraft
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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