I am only guessing (I chose to be vaccinated) but I think a key difference with this vaccine is that it is very different from past vaccines that have been required by schools and employers. It’s called a “leaky” vaccine. Meaning that it doesn’t make you immune from the target disease like say smallpox or polio. It further doesn’t prevent you from transmitting the virus to others. Also, if you are a healthy individual with no co-morbidities you simply have nothing to fear from infection given the treatment protocols currently available. My wife has immune system issues so we opted to be vaccinated. I am healthy. I got the jab as a courtesy for my wife. I took one for the team. Had I been single I would not have taken it. If a vaccine will stop the spread of a dangerous virus then I believe it would be important to require healthcare workers. This one does not. It does nothing to protect the people the healthcare worker is working on. It simply reduces the severity of the healthcare workers illness should be/she get Covid-19.