That’s one of the big reasons. There’s one strain of Covid 19 that they are making and effective vaccine for. The common cold is a whole different animal. It’s very difficult to develop a single vaccine that will cover 160 strains. Think about the flu vaccine. Every time it mutates and there’s a new strain you have to get a new flu shot. Are you going to go out and get 160 common cold shots? No, you aren’t. So that is why in a quick nutshell. There’s also more too it but I’ll save it for my next Ted Talk.
[Post edited by OrangeHokieFan at 07/12/2020 9:00PM]