Immunisation

At time of interview: married, two children, aged 2.5 yrs (daughter) and second child due. Parent's occupation: Mother- Administrator, Father- Company Secretary. Ethnic background: White-British.

At time of interview: married, two children, aged 22 months (daughter) and 4 months (son). Autistic Spectrum Disorder in husband's family. Parent's occupation: Mother- Vet, Father- Letter Cutter. Ethnic background: White-British.

At time of interview: married, one daughter, aged 16 months. Parent's occupation: Mother- Civil Servant MOD, Father- RAF. Ethnic background: White-British.

At time of interview: Married, two children, aged 4 years (daughter), aged 2 years (son). Mother –Full time mum  Father – Teacher. Ethnic background: White-European.

At time of interview: married, two children, aged 4.5 years (son) and 2 years (daughter). Both children are lactose intolerant. Parent's occupation: Mother- Accountant, Father- Home Dad. Ethnic background: White-British.

At time of interview: married, one son aged 1 year. Parent's occupation: Mother- Full time mum, Father- Commercial Ship Operator. Ethnic background: White-British (Scottish).

At time of interview: cohabiting, one son aged 14 months. Undergoing tests to establish whether he has a mild egg allergy. Parent's occupation: Mother- Arts Administrator, Father- Course Lecturer.

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.

At time of interview: married, one son, aged 22 months. Parent's occupation: Mother- Full time mum, Father- Dental Technician. Ethnic background: White-British.

At time of interview: Married, one son aged 16 months. Parent’s occupation: Mother Paediatrician, Father – Own business. Ethnic background: Jewish.

At time of interview: Married, one son, aged 2 years. Born premature at 26 weeks. Parent’s Occupation: Mother – Textile Designer, Father – Carpenter. Ethnic background: White-British.

At time of interview: one daughter, aged 15 months.

At time of interview: married, 5 children aged 21, 18, 16, 4 years (son), 2 years (daughter). Parent's occupation: Mother- Director of Communications, Father- Professional Actor. Ethnic background: White-British.

At time of interview, Married, three sons, aged 5 years, 3 years and 1 year. Youngest boy has an egg allergy. Parent’s Occupation: Mother – Full time Mum, Father – Recruitment Consultant. Ethnic background: White- British

At time of interview: 4 children aged 8 years (son), 7 years (son), 5 years (son), 1 year (daughter). Parent's occupation: Mother- Housewife, Father- Househusband. Ethnic background: White-British.

At time of interview: married, one son, aged 2.5 years. Parent's occupation: Mother- Teacher, Father- University Lecturer. Ethnic background: White-British.

At time of interview: married, two sons, aged 3.5 years and 14 months. Parent's occupation: Mother- Nurse, Father- Nurse/Teacher. Ethnic background: White-British.

At time of interview: married, one son, aged 17 months. Parent's occupation: Mother- Editor (Publishing), Father- Web Editor. Ethnic background: White-British.

At time of interview: married, one daughter, aged 15 months. Parent's occupation: Mother- Doctor, Father- Software manager. Ethnic background: Latin American (Mother), Father (White-British).

At time of interview: married, one daughter, aged 17 months. Parent's occupation: Mother- Administrator, Father- Civil Servant. Ethnic background: Bangladeshi.

At time of interview: married, Twins, 18 months old. Parent's occupation: Mother- Barrister, Father- Teacher. Ethnic background: White-British.

At time of interview: married, two children, aged 5 years (daughter), aged 19 months (son). Parent's occupation: Mother- Housewife, Father- Business Advisor. Ethnic background: White-British.

At time of interview: married, one daughter, aged 19 months. Parent's occupation: Mother- Marketing Consultant, Father- Charity Manager. Ethnic background: White-British.

At time of interview: married, one son, aged 20 months. Parent's occupation: Mother- Illustrator, Father- Museum Director. Ethnic background: White-British.

At time of interview: married, one son, aged 22 months. Parent's occupation: Mother- Ph.D. Student (Public Health), Father- Civil Servant. Ethnic background: White-British.