Birdwatch Note Rating
2024-12-07 16:17:17 UTC - HELPFUL
Rated by Participant: DE8793D768024972C0952BA9ED6CFE33B060F235346845608CBDF1579DD54D54
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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