“You just told the unvaccinated, ‘Yeah, get vaccinated, it’s so scary, but of course, you’ll still have to mask because it’s so scary,’ ” said Monica Gandhi, professor of medicine at the University of California at San Francisco. “If I were an unvaccinated person who was debating whether to get vaccinated, I would think, ‘Oh wow, there’s no point, looks like the delta variant would break through the vaccine anyway.’ ”