The Town of Harrison hosts several flu clinics for town residents in October. The high-dose vaccine for residents 65 and older takes place Oct. 1, from 10 to 11 a.m. There will be two additional clinics for those 18 to 64 — the first Oct. 10, from 10 to 11 a.m. and the next Oct. 23 from 6:30 to 7:30 p.m.