What We Know About The Sars Cov 2 Delta Variant Getty images. delta is now the predominant covid 19 variant – by far – accounting for more than 99% of u.s. cases. and it's no longer a given that you can largely escape covid 19 infection. The mu variant has now been identified in all 50 states. it is not nearly as contagious as delta, but the world health organization labeled it a “variant of interest.” it makes up less than.
Explainer Virus Variants And Strains It’s estimated that delta caused more than twice as many infections as previous variants—in connecticut, it was estimated to have been 80 to 90% more transmissible than the alpha variant. in the u.s., in june 2021, after a steady decline in covid 19 cases and hospitalizations, the arrival of delta coincided with a rapid reversal of that trend. A: currently, all the vaccines appear to have some efficacy against the variants. a recent press release from israel is reporting that the pfizer vaccine had lower effectiveness against the delta variant — around 64% efficacy against the variant for symptomatic infection, meaning somebody could just get sniffles, fever or cold like symptoms. Nipunie rajapakse, m.d., pediatric infectious diseases, mayo clinic: the delta variant is concerning because it is spread much more easily than prior versions of covid 19 that we have seen. this means that more people are getting sick. that means more people are getting hospitalized and dying from the infection as well. The delta variant, which was first identified in india, now accounts for 25 percent of new covid 19 cases in the u.s., and is on track to become the dominant version of the virus circulating in.
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