What to know about Arcturus, a new coronavirus subvariant the WHO is tracking

A new coronavirus subvariant, XBB. 1.16, has been designated as a “variant under monitoring” by the World Health Organization. The latest omicron offshoot is particularly prevalent in India, where it has sparked a rise in infections, and a return to mask mandates in parts of the country.

Here’s what you need to know about the subvariant called Arcturus, which has been documented in 29 countries so far.