Delem, A Comparison of the protective efficacies of the live vaccine RIT 4025 and an inactivated vaccine against a natural heterologous A/Victoria/3/75 infection. [electronic resource] - The Journal of hygiene Oct 1979 - 221-9 p. digital Publication Type: Clinical Trial; Comparative Study; Controlled Clinical Trial; Journal Article ISSN: 0022-1724 Standard No.: 10.1017/s0022172400026000 doi Subjects--Topical Terms: Antibodies, Viral--isolation & purificationAntibody FormationDouble-Blind MethodHumansImmunologic TechniquesInfluenza A virus--immunologyInfluenza Vaccines--immunologyInfluenza, Human--immunologyNeuraminidase--immunologyRandom AllocationVaccines, Attenuated