Johnson will be only the second British leader since Indian independence to attend the annual Republic Day parade in New Delhi as Guest of Honour, after former prime minister John Major in 1993.
Bharat Biotech, Serum Institute, Zydus Cadila, Panacea Biotec, Indian Immunologicals, Mynvax and Biological E are among the domestic pharma firms working on the coronavirus vaccines in India.
Indian Council of Medical Research Director General Balram Bhargava said the purpose of the COVID vaccine drive would be to break the chain of viral transmission.
India has purchased 500 million doses of the Oxford University-AstraZeneca vaccine candidate, one billion from the United States company Novavax and 100 million doses of the Sputnik V candidate from Russia's Gamaleya Research Institute, according to the US-based Duke University Global Health Innovation Center.
As India prepares to launch its vaccine drive on January 16, here is a look at the options:
The dry-run was being conducted in state capitals in at least three session sites. Some states also included districts that are situated in difficult terrain or have poor logistical support, according to officials.
The first COVID-19 vaccine shots in India were given on Saturday to nearly two lakh frontline healthcare and sanitary workers as Prime Minister Narendra Modi rolled out the world's largest inoculation drive against the pandemic that has caused 1,52,093 deaths and upended millions of lives in the country.
'Even after vaccines are given, precautions like using a mask and maintaining social distancing have to be taken.'