June 23, 2021 ~ MedPage Today ~ by John Gever
‘Breakthrough’ COVID Infections Less Transmissible, English Data Indicate
— But variants could be a wild card
People who develop so-called breakthrough infections after receiving either the Pfizer-BioNTech or AstraZeneca vaccines were about half as likely to transmit the virus to household members, compared with households in which unvaccinated people brought the virus home, British researchers reported.
Ross J. Harris, PhD, of Public Health England in London, and colleagues counted some 960,000 household contacts of individuals diagnosed with COVID-19 whose records indicated they had not been vaccinated, plus about 9,000 contacts of vaccinated patients with infections seen 3 weeks or more after receiving at least one vaccine dose.