RT Journal Article SR Electronic T1 Online flu tracking tool receives more than 50,000 surveys: APHA challenge winners announced JF The Nation's Health JO Nations Health FD American Public Health Association SP 5 OP 5 VO 42 IS 10 A1 Michele Late YR 2013 UL http://www.thenationshealth.org/content/42/10/5.1.abstract AB