• Adults (including pregnant women) and children with the following chronic health conditions:
› cardiac or pulmonary disorders (including bronchopulmonary dysplasia, cystic fibrosis and asthma);
› diabetes mellitus and other metabolic diseases;
› cancer, immune compromising conditions (due to underlying disease and/or therapy);
› renal disease;
› anemia or hemoglobinopathy;
› conditions that compromise the management of respiratory secretions and are associated with an increased risk of aspiration;
› morbid obesity (BMI≥40); and
› children and adolescents with conditions treated for long periods with acetylsalicylic acid.
• People of any age who are residents of nursing homes and other chronic care facilities.
• People ≥65 years of age.
• Healthy children 6 to 23 months of age.
• Healthy pregnant women (the risk of influenza-related hospitalization increases with length of gestation, i.e. it is higher in the third than in the second trimester)
• Aboriginal peoples.
• Health care and other care providers in facilities and community settings who, through their activities, are capable of transmitting influenza to those at high risk of influenza complications.
• Household contacts (adults and children) of individuals at high risk of influenza-related complications (whether or not the individual at high risk has been immunized):
› household contacts of individuals at high risk, as listed in the section above;
› household contacts of infants <6 months of age as these infants are at high risk of complications from influenza but cannot receive influenza vaccine; and
› members of a household expecting a newborn during the influenza season.
• Those providing regular child care to children <24 months of age, whether in or out of the home.
• Those who provide services within closed or relatively closed settings to persons at high risk (e.g. crew on a ship).
