Were vaccines tested against placebos?
Vaccines are sometimes tested against other vaccines or adjuvants instead of saline placebos to protect participants' health when an effective vaccine is already available.
Are vaccines placebo tested?
Claims that vaccines are not placebo tested are false. Many vaccines undergo saline-placebo trials, and the use of active controls is guided by ethical standards.
Placebo
A substance that cannot prevent or treat disease. In vaccine testing, the placebo may contain everything that is normally in the vaccine except the active ingredient. A placebo is used…
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