This is the protocol for a review and there is no abstract. The objectives are as follows:
(1) Randomised controlled trials (RCTs) in which patients aged 60 years and older in institutions and health care workers were vaccinated and assess whether vaccinating health care workers is effective in preventing influenza in institutionalised patients aged 60 years and older and HCWs; and
(2) RCTs of vaccinating HCWs and assess whether vaccination reduces:
(a) the incidence of influenza in HCWs; and
(b) days of absence from work.