PT - JOURNAL ARTICLE AU - Natalie McGill TI - Online-only: Study deems whooping cough vaccine safe for seniors DP - 2013 Jan 01 TA - The Nation's Health PG - E54--E54 VI - 42 IP - 10 4099 - http://www.thenationshealth.org/content/42/10/E54.short 4100 - http://www.thenationshealth.org/content/42/10/E54.full SO - Nations Health2013 Jan 01; 42