coronavirus vaccine candidate Covaxin.Pharma major Zydus Cadila had also last week started clinical trials of its COVID-19 vaccine candidate with the first human dosing.Vaccine major Serum Institute of India, which is working on the AstraZeneca Oxford vaccine, plans to start human trials in India in August 2020.Click here to read the Mint ePaperLivemint.com is now on Telegram.