Omicron variant: Do current Covid vaccines and boosters protect against the new variant?
, said that a fourth booster dose might be necessary if the country's Covid cases continued to climb.to use against the new variant if lab tests show significant declines in protection against severe disease, though it could take months before they're ready to be distributed.
Offit is describing a phenomenon immunologists call “original antigenic sin” in which the body’s immune system relies on the memory of its first encounter with a virus, sometimes leading to a weaker immune response when it later encounters another version of the virus. that argued that booster shots should be restricted to those at high risk for severe disease, such as the elderly and those who live or work in high-risk settings, like health care workers. They said the original two doses of the mRNA vaccines are still working for most healthy adults.
Will the existing shot be as good as it was against the original virus?"Maybe or maybe not, but it will probably provide at least some protection against it," she said.Vaccine Researcher Dr. Peter Hotez “No matter what, you can’t wait for your booster because delta is still the dominant variant and will be so, I think, for the foreseeable future,” said Hotez, co-director of the Center for Vaccine Development at Texas Children’s Hospital and dean of the National School of Tropical Medicine at the Baylor College of Medicine in Houston.
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