The Effects of Virus Variants on COVID-19 Vaccines
Read the content and watch the video under the headings "What causes a virus to change to a new variant?" and "What impacts do the new variants of the COVID-19 virus have on vaccines?". (5 minutes)
Click https://www.who.int/news-room/feature-stories/detail/the-effects-of-virus-variants-on-covid-19-vaccines link to open resource.