Global disease experts say little is known about China's experience with long-term COVID effects thought to have afflicted millions with debilitating fatigue, brain fog and other symptoms
In his written message to an international COVID-19 vaccine cooperation forum, Xi also said China would donate $100 million to the COVAX global vaccine distribution scheme, according to the CCTV report.
Foreign Ministry spokesman Zhao Lijian said in late July that China had supplied over 700 million vaccine doses to other countries.