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 in clinical trials to test the effectiveness of vaccines. People in one group get the vaccine, while the others receive the placebo.
Where we talk about Placebo
- Just the Facts Are vaccines placebo tested?
- Just the Facts What is the deal with placebo trials?
- Just the Facts Were vaccines tested against placebos?
- Just the Facts Why won't scientists do placebo trials?
- Just the Facts Were childhood vaccines properly tested?
- Just the Facts Are there randomized controlled trials for vaccines?