, which allowed them to quickly move from getting the right genetic sequence of the SARS-CoV-2 virus and inserting it into their shots to generate a robust immune response. The technology is highly adaptable and means that additional vaccines, directed against new genetic targets on the virus, such as Omicron, will take weeks rather than years.
Whether a vaccine targeted directly against Omicron will be necessary, however, depends on the results of studies that pit existing vaccine-induced antibodies and immune cells against the variant in a lab. If the current protection from vaccines continues to control Omicron, then it will be even more critical for people to get a booster shot of the existing authorized or approved vaccines.
If, on the other hand, the studies show that the existing vaccine protection against Omicron is weak, public health officials and vaccine makers will have to decide two things: first, whether people need to be re-vaccinated against Omicron with two doses of a a new, variant-specific mRNA vaccine; or if a booster with an Omicron-targeted dose will be enough.and AstraZeneca, are also testing how their shots fare against Omicron.
The latest variant isn’t a surprise to vaccine and public health experts, who warn that other variants like it are inevitable if vaccination rates remain low around the world. Viruses mutate when they copy their genetic material to duplicate themselves—basically, when they infect someone. The more infections and the more copying the virus squeezes in, the more opportunities it has to generate mutations and variants like Omicron.
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