Birdwatch Note Rating
2023-07-27 14:48:26 UTC - HELPFUL
Rated by Participant: 4A7A82C0407E75345AD7D93C1642776FA62A7186D7AB1B4C24802A2077020F4F
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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