To be fair, vaccines can be hard sometimes. They depend on the virus having some unique feature on its “skin” that the immune system can be taught to target. If, for example, the proteins on the virus’s coat are the same as proteins found in the human body, it would be a bad thing for the immune system to start attacking that.
That’s just one of many complications with coming up with a vaccine.
Power has been off since about 4:30 here. We had a big, close lightning strike. I’m running lights and internet from battery power, and freeping on the tablet.
/johnny