Competing interests
J.M.R., L.P.C. R&D and CMC Group, F.M.O., J.C.V. are employees of Laboratorio Pablo Cassará S.R.L., which developed the vaccine and funded the trial. M.L. and J.F. are external consultants and received honoraria from Laboratorio Pablo Cassará S.R.L. All other authors declare no competing interests.