This Israeli study finds that in healthcare workers (HCWs) vaccinated with the Pfizer-BioNTech vaccine who had breakthrough infections, the suspected source was an unvaccinated person.
Among 11,453 fully vaccinated HCWs, 1,497 had RT-PCR testing during the study period. Of the tested HCWs, 39 breakthrough cases were found.
In 37 HCWs for whom data were available on the source of the infection, the suspected source was an unvaccinated person, and in 21 HCWs, the suspected source was a household member.
Though most breakthrough infections were mild or asymptomatic, persistent symptoms did occur in some, the researchers note.Read More >>