JUST IN: Pfizer and BioNTech announce that they have started a clinical trial testing a modified Covid-19 vaccine to protect against the omicron variant.
The CDC studies also suggested that existing boosters offered “significant protection” against both infection and symptomatic illness, although the protection was higher during the delta surge compared to the omicron surge.
While the existing vaccines can protect people against some of the worst outcomes of Covid, drugmakers have said they wouldJohn Moore, a professor of microbiology and immunology at Weill Cornell Medical College, said the modified shots could become important in a"worst-case scenario" in which the omicron variant mutates to become as lethal as the delta variant.
"That scenario is not impossible," he said."If it happens, the new variant would kill a lot of vaccinated people and change the face of the pandemic for the worse."Moore added that by the time the results from the trial are in, public health officials and outside experts should know more about the trajectory of the pandemic.
Will omicron remain the dominant variant, or will it become a minor contributor to the overall pandemic? Will another variant more closely related to the ones that appeared last year emerge? "We may not know that answer any time soon, but in the end it’s relevant to whether and how an omicron-based vaccine will be useful," he said.
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