Five year follow-up after primary vaccination against tick-borne encephalitis in children.

•Persistence after primary pediatric tick-borne encephalitis vaccinations.•Primary series: Encepur® Children alone or mixed with FSME-IMMUN® Junior.•Conventional or accelerated conventional schedule.•Immunogenicity and safety monitored 3–5 years.•Encepur® Children alone (either schedule) was immunogenic from 3 to 5 years.