Disease
Incubation
Period of Infection
When can a Child return to pre-school
Chicken Pox
13-17 days
 1-2 days before the rash, until 7 days after the rash first appears When clinically recovered or 7 days after the onset of rash

Dysentry or Gastro-enteritis
1-4 days
 Until diarrhoea stops 24hrs after diarrhoea has stopped and the child is well
Measles
8-14 days
 1 day before the first symptom until 7 days after the onset of the rash When clinically recovered or 7 days after the onset of rash
Mumps
17-19 days
 9 days before swelling until swelling subsides When clinically recovered or 48hrs after the antibiotics start
Scarlet Fever & Streptococcal Infection
1-3 days
 The Day sore throat starts until day after antibiotics start When clinically recovered or 48hrs after the antibiotics start
Whooping cough
7-10 days
 3-4 days before until 21 days after the onset of coughing. If treated with antibiotics 5-7 days after starting course When clinically recovered
Infective Jaundice (hepatitis A)
15-150 days
 Several days before first symptoms until 7 days after the onset of jaundice When clinically recovered unless otherwise stated by a doctor
Impetigo
No exclusion if treated
Threadworms
No exclusion if treated
Head lice
No exclusion if treated
Cold sores
No exclusion after lesions scab
Conjunctivitis
12-72hrs
 Exclusion until condition is cleared up
Rubella
16-18 days
 Few days before first symptoms until 7 days after onset When clinically recovered or 7 days after the onset of the rash