Is Omicron really less severe than Delta? Here's what the science says.

This variant is more transmissible. So how do you protect yourself? And what are the implications for vaccines, masks, hygiene, and social distancing?

If you get COVID-19 in the United States right now, chances are high that it’s the Omicron variant, which now accounts for around 95 percent of the country’s reported cases. With dozens of mutations, Omicron is different from the previously dominant Delta variant in significant ways, which means that, after two years of getting a handle on how to manage risk, you might need to shift at least some of your behaviors.

Among the changes, Omicron is more transmissible and better at evading existing antibodies. “To me, the biggest shift, the most shocking thing, is how incredibly infectious this thing is. I have never seen anything so infectious in my life,” says Carlos del Rio, an epidemiologist and infectious

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