http://www.cdc.gov/mmwr/previe... http://www.cdc.gov/mmwr/preview/mmwrhtml/00041848.htm still in use http://www.cdc.gov/mmwr/previe... http://www.cdc.gov/mmwr/previe... Plague vaccine, http://www.cdc.gov/mmwr/preview/mmwrhtml/00041848.htm "Plague Vaccine" "Plague Vaccine" http://www.cdc.gov/mmwr/previe... http://www.cdc.gov/mmwr/previe...