{"treatment":"vaccine","outcome":"infection"}
{"treatment":"vaccine","outcome":"infection"}
{"treatment":"vaccine","outcome":"infection"}
{"treatment":"vaccine","outcome":"infection"}
{"treatment":"vaccine","outcome":"infection"}
{"treatment":"vaccine","outcome":"no infection"}
{"treatment":"vaccine","outcome":"no infection"}
{"treatment":"vaccine","outcome":"no infection"}
{"treatment":"vaccine","outcome":"no infection"}
{"treatment":"vaccine","outcome":"no infection"}
{"treatment":"vaccine","outcome":"no infection"}
{"treatment":"vaccine","outcome":"no infection"}
{"treatment":"vaccine","outcome":"no infection"}
{"treatment":"vaccine","outcome":"no infection"}
{"treatment":"placebo","outcome":"infection"}
{"treatment":"placebo","outcome":"infection"}
{"treatment":"placebo","outcome":"infection"}
{"treatment":"placebo","outcome":"infection"}
{"treatment":"placebo","outcome":"infection"}
{"treatment":"placebo","outcome":"infection"}