PT - JOURNAL ARTICLE AU - Susan Fletcher TI - Creating immunity DP - 2003 Aug 19 TA - Canadian Medical Association Journal PG - 282--283 VI - 169 IP - 4 4099 - http://www.cmaj.ca/content/169/4/282.4.short 4100 - http://www.cmaj.ca/content/169/4/282.4.full SO - CMAJ2003 Aug 19; 169