The source of the ubiquitous 'less than 1% of vaccine adverse events are reported' claim. Nuances: (1) the <1% sentence is a literature-based estimate in the introduction, not a measurement of this project; (2) the project's own automated surveillance of 1.4 million vaccine doses to 376,452 individuals flagged 35,570 possible reactions (2.6%); (3) the planned system-performance evaluation was never completed — 'the necessary CDC contacts were no longer available and the CDC consultants… were no longer responsive to our multiple requests'; (4) AHRQ's disclaimer states findings are the authors' own, not an official AHRQ/HHS position.
Likewise, fewer than 1% of vaccine adverse events are reported.
Final report, introduction (grant period 12/01/2007-09/30/2010)
The source of the ubiquitous 'less than 1% of vaccine adverse events are reported' claim. Nuances: (1) the <1% sentence is a literature-based estimate in the introduction, not a measurement of this project; (2) the project's own automated surveillance of 1.4 million vaccine doses to 376,452 individuals flagged 35,570 possible reactions (2.6%); (3) the planned system-performance evaluation was never completed — 'the necessary CDC contacts were no longer available and the CDC consultants… were no longer responsive to our multiple requests'; (4) AHRQ's disclaimer states findings are the authors' own, not an official AHRQ/HHS position. Contractor report funded by AHRQ; copyright status unclear. The <1% figure is real but is an inherited estimate;