RT Journal Article SR Electronic T1 As norovirus outbreaks grow, health departments respond: Millions infected each year with virus JF The Nation's Health JO Nations Health FD American Public Health Association SP 1 OP 14 VO 43 IS 2 A1 Charlotte Tucker YR 2013 UL http://www.thenationshealth.org/content/43/2/1.3.abstract AB