One, because a new vaccine hasn't been proven safe to administer yet. And even 'proven safe' just means that the vast majority of recipients won't experience permanent side effects. You're intentionally triggering an immune response in the patient. What if you triggered an autoimmune response? Now you have a created a whole new autoimmune disease (and I dunno if you've noticed, but we mostly treat symptoms and not that well).
That said, a few people react even to approved vaccines badly. Unfortunately this fact feeds the anti-vax people, who don't seem to understand how to model risks. Just going to the drugstore to pick up antibiotics that will save your life has a larger chance of death (due to a car accident). It's more dangerous to drive to the doctor to get vaccinated than it is to get vaccinated.
Just living is dangerous. I'm running out of fingers on one hand to count the number of times I've tried to choke to death eating or drinking something, and I've got half a billion years of evolution trying to keep me from killing myself just trying to absorb nutrients.
Nothing is guaranteed. Anything can kill you. Better to get on with life rather than wait for Death to find you.
Where was I? Medical ethics.
Medical ethics has some opinions on how 'informed' a person can be to volunteer for experiments. A peer who is in your field is presumed to know the consequences of their choices better than just about anybody. So yes, a medical researcher experimenting essentially on themselves is quite different than the same person doing trials on others.
See also the doctor who gave himself an ulcer to prove that ulcers were of bacterial origin. Won a Nobel Prize for that discovery. If he'd done it on someone else he'd have been in big trouble.
That said, a few people react even to approved vaccines badly. Unfortunately this fact feeds the anti-vax people, who don't seem to understand how to model risks. Just going to the drugstore to pick up antibiotics that will save your life has a larger chance of death (due to a car accident). It's more dangerous to drive to the doctor to get vaccinated than it is to get vaccinated.
Just living is dangerous. I'm running out of fingers on one hand to count the number of times I've tried to choke to death eating or drinking something, and I've got half a billion years of evolution trying to keep me from killing myself just trying to absorb nutrients.
Nothing is guaranteed. Anything can kill you. Better to get on with life rather than wait for Death to find you.
Where was I? Medical ethics.
Medical ethics has some opinions on how 'informed' a person can be to volunteer for experiments. A peer who is in your field is presumed to know the consequences of their choices better than just about anybody. So yes, a medical researcher experimenting essentially on themselves is quite different than the same person doing trials on others.
See also the doctor who gave himself an ulcer to prove that ulcers were of bacterial origin. Won a Nobel Prize for that discovery. If he'd done it on someone else he'd have been in big trouble.