Department of Health (1996) Immunisation against infectious disease (the Green Book). Available at http://www.dh.gov.uk/en/Publichealth/Healthprotection/Immunisation/Greenbook/DH_4097254 (accessed on 4th September 2009).
2.
Department of Health (2006) Immunisation against infectious disease (the Green Book). Available at http://www.dh.gov.uk/en/Publichealth/Healthprotection/Immunisation/Greenbook/DH_4097254 (accessed on 4th September 2009).
3.
Health Protection Agency (2008) Statement from the PHLS virology committee - serum and saliva testing to determine immunity to measles, mumps and rubella. Available at http://www.hpa.org.uk/webw/HPAweb&HPAwebStandard/HPAweb_C/1195733831557?p=191942172909 (accessed on 4th September 2009).
