Omicron's Immune Evasion Behind Rapid Spread, Say Studies

Harvard researchers also found that five days after an initial positive test for Omicron, about half of tested individuals had viral loads high enough that they were probably still infectious.

Omicron's Immune Evasion Behind Rapid Spread, Say Studies

Two new studies, not yet peer-reviewed, have shown immune evasion is the reason behind the Omicron variant's increased transmissibility.

The Omicron variant, first reported from South Africa and Botswana in late November, has now been detected in 171 countries so far.