The government has placed orders for one crore additional doses of Covishield from Serum Institute of India and 45 lakh more doses of Covaxin from Bharat Biotech, officials of the two vaccine makers said on Tuesday.

The government had earlier placed a purchase order with Serum Institute of India (SII) for 1.1 crore doses of AstraZeneca-Oxford Covid-19 vaccine, Covishield.

When asked, a Bharat Biotech spokesperson said, "The company has received a letter of comfort from the Government of India to supply another 4.5 million (or 45 lakh) doses''.

The spokesperson also added that Bharat Biotech will also be exporting its Covid-19 vaccine, Covaxin, to Brazil and the United Arab Emirates.

The company is also likely to export the vaccine to the Philippines and other South Asian countries, the spokesperson said.

India's Covid-19 vaccination drive was launched by Prime Minister Narendra Modi on January 16