POLIOMYELITIS vaccine field trials in Virginia--1954.
D000818:Animals; D035843:Biomedical Research; D017812:Colubridae; D011051:Poliomyelitis / Q000517:prevention & control*; D014611:Vaccination; D014612:Vaccines; D014768:Virginia
D014612:Vaccines
POLIOMYELITIS/prevention and control; VACCINES AND VACCINATION