US President Joe Biden warned Thursday that despite falling Covid-19 cases and a steady rise in vaccinations, "this is not a time to relax."
"We must keep washing our hands, stay socially distanced and for God's sake, for God's sake, wear a mask," Biden said at an event marking the administering of 50 million vaccines since he took office in January.
"The vaccines are safe and effective," he said.
Published 26 February 2021, 04:38 IST