Actors Hrithik Roshan, Ajay Devgn and Varun Dhawan appealed to people who have recovered from coronavirus to donate blood to help those in critical condition.
The local municipal body, Brihanmumbai Municipal Corporation (BMC) said that recovered COVID-19 patients have antibodies that can protect against the virus.
"They can now donate their blood and plasma four weeks after recovery or post negative swab tests & contribute in the fight," BMC tweeted.
Taking to Twitter, Ajay wrote, "If you've recovered from COVID19, you are a Corona warrior. We need an army of such warriors to overcome this invisible enemy. Your blood contains the bullets that can kill the virus. Please donate your blood, so others, especially the serious ones can recover. Sign up now."