The vaccine stock that arrived early Wednesday is the second donation from China, following a shipment of 600,000 doses in March.
Vaccine shortage: Serum Institute to produce 10 crore doses by August, Bharat Biotech promises 7.8 crore jabs
The sources said the Union Health Ministry and the office of Drugs Controller General of India had sought from both the firms their production plan for June, July, August and September.
While the JCVI reiterates that the benefits from the vaccine continue to outweigh the risks, younger age groups are believed at a higher risk from the rare blood clots.
Sri Lanka temporarily suspends COVID-19 jabs due to delay in securing vaccines from Serum Institute of India: Minister
Sri Lanka launched its inoculation programme late January when India gifted 500,000 doses of Oxford-AstraZeneca.
Centre places new purchase order with Serum Institute of India for 10 crore doses of Covishield vaccine
The cost of the 10 crore doses would be borne by the health ministry under the budgetary allocation for the purpose.