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
Reasons for the cut include export restrictions on key supplier Serum Institute of India (SII), Gavi said in a joint statement with the Coalition for Epidemic Preparedness Innovations (CEPI), the World Health Organisation and Unicef.
Manufacturing problems at Johnson & Johnson and AstraZeneca as well as delays in the regulatory review of shots developed by US biotech firm Novavax and China's Clover Biopharmaceuticals were further limiting factors, the organisations said.