Birdwatch Note Rating
2023-07-27 16:52:53 UTC - HELPFUL
Rated by Participant: 91C85FEE17442EAA947F33D8525232045C7F32D45E17ABC59F893F15DE3022BB
Participant Details
Original Note:
The 1st Hep B vaccine (plasma derived), was tested in several placebo trials. The safer, recombinant vaccine was approved in '87 after comparison studies w/the previous vaccine. When you replace an old vaccine with new the correct trial is old v. new vaccine. https://pubmed.ncbi.nlm.nih.gov/3903646/ https://apps.who.int/iris/handle/10665/264444
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