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News Articles: severe disease

Staff volunteers queue to receive a fourth dose of the Pfizer COVID-19 vaccine at Sheba Medical Center in Israel on Dec. 27, 2021, as the hospital conducted a trial of a fourth jab of the vaccine.

Who might benefit from a 4th shot — and who might not

Some countries are moving ahead with plans to offer a fourth dose of COVID-19 vaccine. But studies are raising questions about the potential advantages of this extra booster.

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By:
  • Michaeleen Doucleff
This colorized transmission electron micrograph image shows SARS-CoV-2, the coronavirus that causes the disease COVID-19. This specimen was isolated from a patient in the United States. Particles of the virus (yellow) are emerging from the surface of cells cultured in the lab (pink).

Fact check: The theory that SARS-CoV-2 is becoming milder

A look at the data that omicron is less severe. What does that mean for the future of SARS-CoV-2 — and the pandemic?

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By:
  • Michaeleen Doucleff