Last Update: Sep 23, 2022.

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What makes Omicron more transmissible?

Omicron mutations in the spike protein, they discovered, made virus-like particles twice as infectious as those with the ancestral spike protein. And virus-like particles carrying Omicron's mutations in the nucleocapsid protein were 30 times more infectious than the ancestral SARS-CoV-2.

At present, the original BA.1 Omicron lineage is being replaced by another, called BA. 2. This lineage, although probably more transmissible than BA.

nOmicron is highly transmissible compared to Delta, Garcia noted. “The viral load is much higher in Omicron, which means that someone infected with the Omicron variant is more infectious than someone infected with the Delta variant.n

White House chief medical advisor Dr. Anthony Fauci said BA. 2 is about 50% to 60% more transmissible than omicron, but it does not appear to be more severe.

How Much More Transmissible Is BA.2 Than Omicron? Here's What

White House chief medical advisor Dr. Anthony Fauci said BA. 2 is about 50% to 60% more transmissible than omicron, but it does not appear to be more severe.

How Much More Transmissible Is BA.2 Than Omicron? Here's What

The next variant could be equally or even more transmissible than Omicron. It could give people more severe symptoms – or no symptoms at all. “It's not at all clear what comes next,” said Dr. George Rutherford, an epidemiologist at the University of California, San Francisco.

BA.2 does not appear to be more severe than the previous version of Omicron. Omicron proved to be a paradox: It was highly transmissible, but an individual infection was, on average, less likely to lead to a serious case of Covid than infections from Delta.

Similarly, Japanese research concludes Omicron is 4.2 times more transmissible than Delta early on. So, in a fully susceptible (unvaccinated and uninfected) population, one person with Delta would, on average, infect five other people, while one person with Omicron could transmit the virus to about 20 others.

What We Know About The 'stealth' BA.2 Omicron Variant

BA.2 does not appear to be more severe than the previous version of Omicron. The Omicron variant proved to be a paradox: It was highly transmissible, but an individual infection was on average less likely to lead to a serious case of Covid than infections from the Delta variant.

What We Know About The 'stealth' BA.2 Omicron Variant

White House chief medical advisor Dr. Anthony Fauci said BA.2 is about 50% to 60% more transmissible than omicron, but it does not appear to be more severe. "It does have increased transmission capability," Fauci previously said on ABC's "This Week."

Coronavirus cases from a highly transmissible omicron subvariant are increasing in the U.S., according to data from the Centers for Disease Control and Prevention. BA.2, or “stealth” omicron, was responsible for over 11% of coronavirus cases in the U.S. last week, the CDC estimates.

U.S. health experts are warning BA.2 could soon lead to another uptick in domestic coronavirus cases. White House chief medical advisor Dr. Anthony Fauci said BA.2 is about 50% to 60% more transmissible than omicron, but it does not appear to be more severe.

The Next Variant: Three Key Questions About What's After Omicron

At present, the original BA.1 Omicron lineage is being replaced by another, called BA. 2. This lineage, although probably more transmissible than BA. 1, does not seem to be a major change from the original one that swept through many countries earlier this year.

The Next Variant: Three Key Questions About What's After Omicron

While much attention has been paid to Gorsuch's lack of a mask in oral arguments, he is not the only justice to appear without one since the emergence of the highly transmissible Omicron variant.

Kelly Ripa and Ryan Seacrest Host Live's First 2022 Show Virtually 'Out of an Abundance of Caution' Live with Kelly and Ryan is filming virtually as coronavirus cases spike due to the highly transmissible Omicron variant.