TY - JOUR T1 - Policies must keep pace with the evolution of vaccines JF - Canadian Medical Association Journal JO - CMAJ SP - 179 LP - 179-a VL - 164 IS - 2 AU - Victor C. Goldbloom Y1 - 2001/01/23 UR - http://www.cmaj.ca/content/164/2/179.2.abstract ER -