title: Ecological aspects in vaccine trials.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Ali
authors.forename: John D
authors.initials: JD
authors.lastname: Clemens
mesh_terms: D000818:Animals; D002986:Clinical Trials as Topic / Q000379:methods* / Q000639:trends; D004463:Ecology / Q000639:trends; D040362:Geographic Information Systems / Q000639:trends; D006801:Humans; D014612:Vaccines
chemical_list: D014612:Vaccines