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(A) Varicella CI according to school exclusion (school exclusion - current: plain, no school exclusion: dashed). (B) Varicella CI according to age at first-school enrolment: at 3 y.o. (current policy) (bold), at 2 y.o. (dashed), at 4 y.o. (dotted), at 5 y.o. (dash dotted).
