Flu vaccinations
「All children (aged 6 months to 12 years inclusive) should receive 2
shots given at an interval of 2 - 4 weeks.
Adults and children aged 13 years and older need to have 1 shot only
if they received the flu vaccination last year.
However, if they did not receive the flu vaccination last year, 2
shots are advised, separated by an interval of 1 - 4 weeks.」