The AHA and Association for Professionals in Infection Control and Epidemiology will host a Twitter chat Oct. 21 on the important roles patients, families and health care professionals play in preventing infections. Topics will include hand hygiene, flu vaccination and antibiotic resistance. Join the 12 p.m. ET chat, during International Infection Prevention Week, at #IIPWChat. The chat also marks the beginning of the AHA’s United Against the Flu campaign, when national health care organizations will promote the importance of flu vaccination.