PT - JOURNAL ARTICLE AU - Lauren Vogel TI - Vaccinate or mask pays off AID - 10.1503/cmaj.109-4959 DP - 2015 Jan 06 TA - Canadian Medical Association Journal PG - 19--19 VI - 187 IP - 1 4099 - http://www.cmaj.ca/content/187/1/19.short 4100 - http://www.cmaj.ca/content/187/1/19.full SO - CMAJ2015 Jan 06; 187