No time for complacency.
Alberts
M
M
D049673:History, 20th Century; D006801:Humans; D007484:Iowa; D008457:Measles / Q000517:prevention & control*; D011051:Poliomyelitis / Q000517:prevention & control*; D014611:Vaccination / Q000266:history*; D014917:Whooping Cough / Q000517:prevention & control*