Three-quarters of those infected with Covid at US county were fully vaccinated - study
A new study by the US Centers for Disease Control and Prevention shows that almost
75% of people who became infected with Covid-19 at public events in a Massachusetts county had been fully vaccinated.
The new study’s authors recommended that local health authorities consider requiring masks in indoor public settings regardless of vaccination status or the number of coronavirus cases in the community.
The study identified 469 people with Covid-19, 74% of whom were fully vaccinated, following large public events in the state’s Barnstable county. The viral load was similar in people who were fully vaccinated and those who were unvaccinated, the CDC said.
The finding of the report “is concerning and was a pivotal discovery leading to CDC’s updated mask recommendation,” CDC director Rochelle Walensky said in a statement.
“The masking recommendation was updated to ensure the vaccinated public would not unknowingly transmit virus to others, including their unvaccinated or immunocompromised loved ones,” Walensky said.
It comes after the World Health Organization said higher rates of mortality have not been recorded from the Delta variant, suggesting that while it is about 50% more transmissible this does not necessarily equate to a greater death or significantly higher hospitalisation risk.
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