From December 2022, 12 to April 1, 2023, a total of 4,13 local cases of new coronavirus genome effective sequences were reported nationwide. A total of 106 cases of the variant of indigenous concern were detected, including XBB.328.1, also known as Arcturus.

This new variant is considered the most transmissible, and symptoms such as conjunctivitis have been reported. Professor Sun Yamin of the Institute of Public Health and Health of Nankai University said it is not a "powerful" new strain that necessarily causes new transmission.