Booster Shots Needed Against Omicron, CDC Studies Show – 9 & 10 News

The papers echo previous research — including studies in Germany, South Africa and the U.K.

It found vaccine effectiveness was best after three doses of the Pfizer or Moderna vaccines in preventing COVID-19-associated emergency department and urgent care visits.

The second study focused on COVID-19 case and death rates in 25 states from the beginning of April through Christmas.

Three shots of the Pfizer and Moderna vaccines were about 67% effective against omicron-related symptomatic disease compared with unvaccinated people.

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