Doomsday,
New vaccines ARE tested in Placebo tests. You are simply making up facts here. The only time Placebos (as in totally fake vaccines filled with saline for example) aren’t used is when there is an existing vaccine that has been proven effective and they are testing an IMPROVED vaccine for the same illness. In that situation due to the ethical issues involved with leaving someone unprotected when a safe vaccine already exists they will often use the old safe (but possibly not as effective) vaccine as a placebo.
I’m honestly not sure from your comments that you even know what a “Placebo” is.
As far as risk: again, there has been study after study done by every major institution of medical science on earth and they all agree that the risk of vaccinating is far below that about which it is necessary to be concerned about. Having your child transported to school or anywhere else for that matter in a motorized vehicle is many times more dangerous then having them vaccinated. Every study done by every major institution of medical science also have come to the conclusion that vaccination eliminates or severely reduces the risk of contracting many dangerous infections that were once common place and extremely dangerous.