Covid in the House

Vaccinated people can pass the Delta variant to their vaccinated housemates, though at lower rates than to unvaccinated people, according to a new Lancet study from Imperial College London, Reuters reports. 

Among household contacts of people infected with Delta, 38% of unvaccinated contacts went on to test positive; 25% of vaccinated contacts did.

Vaccinated contacts who tested positive had received their shots a longer time previously than those who tested negative, supporting the notion of waning immunity and the need for boosters.
 
Bottom line: Vaccination alone can’t stop the spread. “This is likely to be the case for other indoor settings where people spend extended periods of time in close proximity as will occur increasingly as we head into winter,” study co-lead Ajit Lalvani said.

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