ANDERSON, A Potency of vaccine lymph. [electronic resource] - Lancet (London, England) May 1951 - 1067 p. digital Publication Type: Journal Article ISSN: 0140-6736 Standard No.: 10.1016/s0140-6736(51)92580-9 doi Subjects--Topical Terms: HumansSmallpoxVaccine PotencyVaccinesVariola virus