DD goes to a state steiner school, where many children are not vaccinated, and we were sent a table of recommended absence time for childhood illnesses:
CHILDHOOD ILLNESS
INCUBATION AND INFECTIOUS PERIOD/AFTER CARE
MEASLES
Incubation - 8-15 days. Infectious - 9 days before rash; 4 days after rash./
2 weeks rest.
CHICKEN POX
Incubation - 7-21 days.
Infectious - 2 days before rash; 7 days after rash, until last blister has scabbed./2 weeks rest
MUMPS
Incubation - 12-26 days Infectious 9 days from onset of swelling./2 weeks.
WHOOPING COUGH
Incubation period 7-15 days Infectious for 2-4 weeks/2-4 weeks.
SCARLET FEVER
1-3 days incubation 21 days infectious. Unwell for 4-7 days./3 weeks convalescence. Should be checked by Doctor before return.
GERMAN MEASLES (Rubella)
14-21 days incubation. Infectious 4 days after/1 weeks rest.
NB Keep away from expectant mothers at onset of rash.
VOMITING AND DIARRHOEA
Please keep your child at home for 24-hours after any illness that induces vomiting or diarrhoea.
There are I believe statutory absence times- so 11 days would be a bare minimum absence length for mumps, however and for whatever reason the DC caught it.