Pennsylvania isn’t tracking all Covid-19 cases in vaccinated residents, but other states’ data show a clear, relevant trend, says Jeffrey Morris, PhD: “The vaccines are really working, and the unvaccinated are vulnerable.”
Pennsylvania isn’t tracking all Covid-19 cases in vaccinated residents, but other states’ data show a clear, relevant trend, says Jeffrey Morris, PhD: “The vaccines are really working, and the unvaccinated are vulnerable.”