Passengers entering China wait for a transfer bus at the Pudong International Airport in Shanghai, east China, March 19, 2020. (Xinhua/Ding Ting)

China's National Health Commission on Friday published a technical guideline on monkeypox prevention and control. It stated that apart from the virus testing for COVID-19, people entering China should also be screened for monkeypox virus during quarantine, especially those who have a history of travel to countries where monkeypox has been reported 21 days before entering China.