Starting January 5, 2023, all travelers from China, Hong Kong, and Macau must show a negative COVID test to enter the U.S. Travelers must test within two days of their scheduled departure to the U.S. Acceptable tests are listed on the U.S. Centers for Disease Control and Prevention (CDC) website. Travelers under the age of 2 are exempt.
Travelers who have had COVID within the last 90 days may show documentation of recovery instead of a negative COVID test.
Travelers from airports in Seoul, South Korea and Vancouver or Toronto, Canada who have traveled from China, Hong Kong or Macau in the last ten days are also required to present a negative COVID test.
The full announcement can be found here: https://www.cdc.gov/media/releases/2022/p1228-COVID-china.html