There are 100 new Covid vaccines in development. One of them could offer better protection against Omicron.
In the US, Covid-19 cases in the Northeast are increasing again, which has some people worried about yet another surge. This is also one of the most heavily vaccinated parts of the country.
Coronaviruses usually don’t mutate very fast. They don’t carry their genetic material in easily swapped out segments the way influenza viruses do — requiring a reformulated vaccine every year. And coronaviruses have a proofreading mechanism that slows the mutation process. In a worst-case scenario, vaccines could actually make an infection worse by prompting the production of ineffective antibodies
Food and Drug Administration decision to authorise a second shot for those over 50. There’s enough evidence from Israel showing the second booster can offer at least a couple of months of increased protection against severe disease and death. Some experts quoted in the New York Times recently suggested that the reason BA.2 is spreading slower in the US than it did in the UK comes down to the fact that the US had many more Omicron infections with the other sub-variant, BA.1, over the winter. But that’s speculation.
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