नहीं देखा Bio me है ...All viruses, including the virus that causesCOVID-19 (SARS-CoV-2), change over time.These viruses with changes are called'variants.' These changes can affect howcontagious a virus is, how (4)

  • 2 days ago

Category

😹
Fun
Transcript
00:00Support the making of more such films. Become a Patron today!

Recommended