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Dr. Peter Chin-Hong, an infectious disease expert at the University of California at San Francisco School of Medicine, says he thinks its very unlikely that vaccinated people can transmit the virus.
The more evidence we get, it appears its very unlikely for a vaccinated person to transfer the virus to someone else, Chin-Hong said.
The vaccines are especially effective at preventing asymptomatic disease, which Chin-Hong says is where most of the transmission appears.
Chin-Hong also cited real-world studies out of the U.K. and Israel that showed that theres very little transmission from vaccinated people.
The study out of Israel, for example, found that the Pfizer vaccine was at least 97-percent effective in preventing symptomatic disease, critical disease and death.

Similarly, the study found the vaccine to be 94-percent effective at preventing asymptomatic COVID infections, suggesting the vaccine may help stop transmission of the virus.