“The fact that many vaccinated people are testing positive after the vaccine with the delta does not mean the vaccine doesn’t work,” Prof Monica Gandhi, Professor of Medicine and Associate Division Chief of the Division of HIV, Infectious Diseases, and Global Medicine at the University of California San Francisco, told Reuters.
“Many asymptomatic people are tested after vaccination and, without incorporating cycle threshold assessment in the PCR test or using antigen-based testing, we don’t know if that test is really a “case” or a low viral load result from the vaccine fighting the virus in your nose (
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“Moreover, we are seeing more mild symptomatic breakthrough infections with the delta variant although protection of the vaccines against severe disease seems very high and enduring. Vaccinated people are more likely to seek testing with symptoms than the unvaccinated so the cases may be overrepresented more in the vaccinated,” she added.