Question: why has covid been around for so long?

Valerie Vancollie answered on 3 Feb 2022:

Partially because it has adapted to infecting humans really well, so it’s easy to catch and pass on to other people. It also uses common human behaviours (socializing, touching our faces…) to help it spread.

Another reason is also because richer countries have hoarded vaccines and not allowed us to vaccine the whole world equally, so as long as there are areas that aren’t covered as well with the vaccine, then it will continue to spread more easily than it might otherwise.