Summary:Hepatitis A outbreak in a residential school. C. R. Boughton, R. A. Hawkes, N. I. Lehmann and G. S. Grohmann,Aust. N.Z. J. Med., 1980,10, pp. 4–6.Outbreaks of hepatitis A occurred sequentially in two wards for children in a residential institution for the mentally retarded in Sydney. Twenty‐six of 47 children were initially susceptible to hepatitis A. In the first ward affected, 77 of 13 susceptible children (85%), and in the second ward, four of 13 susceptible (31%), were infected. Of the 15 showing serological evidence of infection, five (33%) were clinically jaundi