if on mobile, tap “Listen in browser” to play the theme on the same page
then scroll down to view the video
to see the unique parts of the SARS-CoV-2 virus
The video below shows: The rough ridge called the furin cleavage site of the virus SARS-CoV-2 which acts like a hook, it is located in the spikes of the virus. It opens up, then reveals the polybasic insert.