TY - GEN AU - SEPULVEDA,R D TI - [Smallpox vaccination and its complications in the first month of the mass vaccination campaign in 1950] SN - 0001-6640 PY - 2004///0215 KW - Humans KW - Mass Vaccination KW - Smallpox KW - Vaccination KW - Variola virus N1 - Publication Type: Journal Article ER -