Health
COVID delta variant as contagious as chickenpox, vaccine breakthrough cases can still spread virus: US CDC – Firstpost
Infections in vaccinated Americans also may be as transmissible as those in unvaccinated people, the document said, and lead…
But the internal document hints that even that recommendation may not go far enough. Given higher transmissibility and current vaccine coverage, universal masking is essential, the document said.
The agencys data suggest that people with weak immune systems…
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