In November 2021, the World Health Organization (WHO) first identified the Omicron mutation of the COVID-19 virus as a variant of concern. It quickly became the most common strain worldwide.

Conventional wisdom says Omicron is less likely to cause serious illness, but that might be due to better immunity and treatments, not the virus itself. Omicron seen as milder coronavirus but ...

Omicron is mutating in giant leaps, with scientists racing to keep up. Its diversity is challenging vaccine efficacy and complicating treatment. But this fall, broad spectrum bivalent vaccines may ...

Omicron is mutating in giant leaps, with scientists racing to keep up. Its diversity is challenging vaccine efficacy and complicating treatment. But this fall, broad spectrum bivalent vaccines may ...

Two new Omicron subvariants—BA.4 and BA.5, first identified in South Africa between January and February—are gaining steam in the United States, according to the latest estimates by the ...

When the omicron variant first emerged last November, many doctors, researchers and scientists hoped that the new strain — while more transmissible — would cause fewer deaths. Indeed ...

The omicron variant of the coronavirus has been dominant in the U.S. since December, but the version of omicron that drove the major infection surge during the winter now accounts for less than 2 ...

The good news is that this protection is rescued by three vaccine doses (to 60-75% protection). This means you are 70% less likely to become infected by Omicron if you have received three doses of ...

In November, a new coronavirus variant took the world by storm. Omicron has since caused an unprecedented wave of infections, striking about 90 million people in just 10 weeks. That’s more COVID ...

Three months after Omicron abruptly arrived, we now know more about the variant. So what does the science say about how contagious it is, how long it takes to get sick and how effective vaccines are?