Moderna today started the final phase of trial of its coronavirus vaccine today, involving about 30,000 participants. Moderna joined Oxford University-AstraZenica and two other Chinese companies whose covid vaccines are already undergoing the phase 3 trial.The trial, named COVE, is the first to be implemented under the US government's Operation Warp Speed that aims to accelerate the development, manufacturing and distribution of therapeutics and vaccines for COVID-19.The US has has suffered more than 1.46 lakh coronavirus-related deaths, the highest in the world even as the number of new cases has continued to surge.Click here to read the Mint ePaperLivemint.com is now on Telegram.