India: Six companies working on vaccine for COVID-19
New Delhi, Apr 16 (PTI) Six Indian companies are working on a vaccine for COVID-19, joining global efforts to find a quick preventive for the deadly infection spreading rapidly across the world, says a top Indian scientist.
Nearly 70 vaccine candidates' are being tested and at least three have moved to the human clinical trial stage, but a vaccine for the novel coronavirus is unlikely to be ready for mass use before 2021.
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