This leaflet explains the MenACWY vaccine that protects against 4 types of meningococcal disease (group A, group C, group W and group Y) which can cause severe illness including septicaemia. The MenACWY vaccine is routinely offered to those aged 13 and 14 in school year 9, and young people remain eligible until age 25. Anyone who has missed their MenACWY vaccination should catch up as soon as possible through their school immunisation team or their GP practice, particularly before attending a new college or university.