The Boston Globe has the following:
"The new COVID-19 vaccines from Pfizer and Moderna seem to be remarkably good at preventing serious illness. But it’s unclear how well they will curb the spread of the coronavirus.
That’s because the Pfizer and Moderna trials tracked only how many vaccinated people became sick with COVID-19. That leaves open the possibility that some vaccinated people get infected without developing symptoms and could then silently transmit the virus — especially if they come in close contact with others or stop wearing masks.
If vaccinated people are silent spreaders of the virus, they may keep it circulating in their communities, putting unvaccinated people at risk.
“A lot of people are thinking that once they get vaccinated, they’re not going to have to wear masks anymore,” said Michal Tal, an immunologist at Stanford University. “It’s really going to be critical for them to know if they have to keep wearing masks, because they could still be contagious.”
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