International health 2000 A.D.
D002489:Central America; D003140:Communicable Disease Control / Q000266:history*; D005544:Forecasting; D049673:History, 20th Century; D006801:Humans; D008800:Mexico; D012899:Smallpox / Q000517:prevention & control*; D013020:South America; D014944:World Health Organization / Q000266:history*