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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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A healthy life style may lower the risks for deveoping long Covid--study

Healthy lifestyle may mean lower risk of long Covid, study says

CNN  — People who have a healthy lifestyle before Covid-19 infection may have a lower risk of long Covid than their peers, a new study says.
 
The study, published Monday in JAMA Internal Medicine, looked at almost 2,000 women who reported a positive Covid-19 test between April 2020 and November 2021. The participants were enrolled in the Nurses’ Health Study II, which has been surveying more than 100,000 US nurses since 1989. ...
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