Trivalent influenza vaccine (TIV) given intramuscularly (IM) or subcutaneously (SC), Quadrivalent influenza vaccine (QIV) given intramuscularly (IM), given at minimum age 6 months, children 6 months to 8 years receiving for the 1st time should receive 2 doses separated by at least 4 weeks, children 9 to 18 years should receive one dose yearly, annual vaccination should begin in February but may be given throughout the year