The 4-minute lecture starts with an introduction to COVID-19 and its possible origins. The lecturer provides a basic description of how COVID-19 infects the body by preventing the interferons from recognizing it is a danger. He then discusses how the virus mutates and provides two examples of a UK and South African variant. The lecture also highlights how the virus spreads and its longevity in the air and on surface.
The listening test includes: open questions, table completion and summary gap fill.
