Leaked CDC presentation slides showed that unpublished research indicated that the Delta variant causes more severe illness in unvaccinated people and spreads as easily as chickenpox.
Why it matters: While "breakthrough cases" have been getting media attention, the low numbers show that the pandemic is mostly a threat for the unvaccinated population.
Why it matters: While "breakthrough cases" have been getting media attention, the low numbers show that the pandemic is mostly a threat for the unvaccinated population.
Chart: Less than 0.1% of vaccinated Americans have tested positive for COVID-19
The low numbers show that the pandemic is mostly a threat for the unvaccinated population.
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