Birdwatch Note Rating
2024-12-07 16:12:44 UTC - HELPFUL
Rated by Participant: BB192A3550BD34818B51DAD07949F09754C86A760951DA22B93673899FCF2CA3
Participant Details
Original Note:
The first generation of vaccines is tested against a placebo but future generations of the same vaccine are tested against their previous generation, because it is not ethical to expose patients to vaccine preventable diseases once vaccinations are available. https://www.canada.ca/en/public-health/services/immunization/national-advisory-committee-on-immunization-naci.html
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