Probably for a number of reasons, starting from our desire as a society to ensure they are as broadly applied as possible, which is in turn driven by our desire as a society (read: "collective") to ensure that they're as effective as possible, which means driving for herd immunity and even things like permanent eradication.
"I'm just asking questions!"
Probably for a number of reasons, starting from our desire as a society to ensure they are as broadly applied as possible, which is in turn driven by our desire as a society (read: "collective") to ensure that they're as effective as possible, which means driving for herd immunity and even things like permanent eradication.
For those who aren't aware of any "blanket liability immunity", I found https://www.hrsa.gov/vaccine-compensation/faq a useful starting point. I hadn't heard of such before.