Covid update: CBSE board exams; Moderna rejects Punjab plea; states extend curbs

From Moderna Inc rejecting Punjab government's plea for vaccine supply, to many states extending lockdown-like restrictions - here are the top news updates on the Covid-19 pandemic. Delhi and Haryana extended curbs, while Rajasthan announced a three-tier lockdown. Meanwhile, Delhi and Karnataka saw slight improvement in daily new case numbers. India also crossed a milestone by conducting over 21.23 lakh tests in a day, the highest so far. Watch the full video for the other updates on the spread of the Sars-CoV-2 coronavirus.