Following pandemic news too closely can be an emotional roller coaster, with dire public health warnings immediately followed by hopeful new studies. The latest soaring discovery: a new CDC study showing vaccines sharply cut all Covid-19 infections — not just symptoms. That news puts to rest one worst-case-scenario: that vaccines might protect the vaccinated against hospitalization, but allow millions of silent infections to continue circulating.
The new data were collected from 4,000 health care workers, first responders, delivery workers and teachers who were vaccinated with the Pfizer or Moderna vaccines between December 2020 and March 2021. The participants were asked not only to monitor symptoms but also to test themselves weekly. The study authors concluded the vaccines caused a 90% reduction in all infections. If people aren’t getting infected, they can’t transmit the virus to others.