Intent to obtain pediatric influenza vaccine among mothers in four middle income countries.

Background: Despite a large burden of influenza in middle income countries, pediatric vaccination coverage remains low. The aims of this study were to (1) describe mothers' knowledge and attitudes about influenza illnesses and vaccination, and (2) identify characteristics associated with mothers' intent to vaccinate their child.

Methods: From 2015 to 2017, infants 0-11 months old in Nicaragua, Philippines, Jordan, and Albania were enrolled from community settings and hospitals.

Influenza and respiratory syncytial virus in infants study (IRIS) of hospitalized and non-ill infants aged <1 year in four countries: study design and methods.

Background: This multi-country prospective study of infants aged <1 year aims to assess the frequency of influenza virus and respiratory syncytial virus (RSV) infections associated with hospitalizations, to describe clinical features and antibody response to infection, and to examine predictors of very severe disease requiring intensive care.

Methods/design: We are enrolling a hospital-based cohort and a sample of non-ill infants in four countries (Albania, Jordan, Nicaragua, and the Philippines) using a common protocol. We are currently starting year 2 of a 2- to 3-year study and will enroll approximately 3,000 infants hospitalized for any acute illness (respiratory or non-respiratory) during periods of local influenza and/or RSV circulation.