Interview 20 Background: At time of interview: married, three sons, aged 9 years, 7 years and 1 year. Parent's occupation: Both are full time carers for their 7-year-old son who is severely autistic. Ethnic background: White-British. Brief outline:For DTaP/IPV/Hib: Followed recommendations of health professionals for two eldest boys. For MMR: They followed recommendations of health professionals for two eldest boys. Reactions that their second son had to MMR, an extensive review of research papers in medical journals, and using the Internet to read about both pro and anti immunisation arguments helped them to make their decisions for their youngest son.