Vesikari et al. — Safety and Efficacy of a Pentavalent Human–Bovine (WC3) Reassortant Rotavirus Vaccine

New England Journal of Medicine, 2006 · 10.1056/NEJMoa052664

HELD UP

In plain language

Vesikari et al. (NEJM 2006), the REST trial, tested the oral pentavalent rotavirus vaccine RotaTeq against an inert placebo in 68,038 infants, powered for the safety endpoint of intussusception. Like Rotarix, RotaTeq is oral and non-adjuvanted, so its placebo is a genuine inert comparator rather than an adjuvant or another vaccine. Intussusception occurred in 6 vaccine versus 5 placebo recipients within 42 days of any dose (a null difference) and 12 versus 15 within one year. The design therefore supports an absolute vaccine-versus-nothing safety inference, independently reproducing the rotavirus exception seen in the sibling product. The audit found no arithmetic or design problem: a second true-placebo positive control.

Flags

None — the paper held up.

Method — the checks that were run

recompute intussusception risk — 6 vs 5 within 42 days (null) and 12 vs 15 within 1 year across 68,038 infants; no excess.
classify comparator — Oral, non-adjuvanted vaccine vs inert placebo -> a genuine absolute-safety baseline.

Next leads — where to look next

10.1056/NEJMoa1012952 Post-licensure intussusception signal after rotavirus vaccination; tests whether the pre-licensure null holds against larger post-marketing surveillance.
Post-licensure intussusception signal after rotavirus vaccination; tests whether the pre-licensure null holds against larger post-marketing surveillance.

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