New “Delta Plus” OffShoot Called AY.4.2 May Be Most Infectious Covid Variant Yet; On Rise In U.K.
But Balloux warned that even an approximately 10% increase in infectiousness “does not explain much of the recent case rises in the UK. Assuming 10% higher transmissibility and a freq of 10% only translates in 1% additional cases per ~5 day viral generation interval.” The rise of cases overall in the UK since the end of July has been a staggering 85%.
But make no mistake, a 10% rise in transmissibility would be significant, especially since that’s 10% more than the more well-known Delta variant first identified in India, B.1.167.2, which itself already spreads “much faster than other variants,”Former FDA commissioner Dr. Scott Gottlieb also tweeted about so-called Covid Plus on Saturday.
“UK reported its biggest one-day Covid case increase in 3 months just as the new delta variant AY.4 with the S:Y145H mutation in the spike reaches 8% of UK sequenced cases,” wrote Gottlieb. “We need urgent research to figure out if this delta plus is more transmissible, has partial immune evasion?” UK reported its biggest one-day Covid case increase in 3 months just as the new delta variant AY.4 with the S:Y145H mutation in the spike reaches 8% of UK sequenced cases. We need urgent research to figure out if this delta plus is more transmissible, has partial immune evasion?
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