G Manikkavasagan1, M Ramsay. 1. HPA Centre for Infections, London NW9 5EQ, UK. gayatri.manikkavasagan@hpa.org.uk
Abstract
OBJECTIVE: To establish the most appropriate age ranges for the use of human normal immunoglobulin and MMR vaccine as postexposure prophylaxis. DESIGN: Review of literature and of laboratory confirmed measles cases. SETTING: England and Wales and countries with a similar measles epidemiological profile. PATIENTS: Women of childbearing age and infants. MAIN OUTCOME MEASURES: The risk of measles, maternally derived measles antibody levels and the response to measles containing vaccines in infants. RESULTS: By 4 to 5 months of age, only 28-45% of infants born to women from highly vaccinated populations have protective levels of measles antibody. In the postvaccine era, between 74% and 80% of infants vaccinated between 6 and 9 months respond to vaccine, and around 67% have clinical protection from measles vaccination. CONCLUSION: This study suggests that many infants being born in the UK will become susceptible to measles before 6 months and will be able to respond to vaccine between 6 and 9 months of age. It is proposed that current guidance is changed to recommend passive immunisation with human normal immunoglobulin for most infants exposed to measles below 6 months of age. For infants aged 6 months or over exposed to measles, vaccination with MMR may be given.
OBJECTIVE: To establish the most appropriate age ranges for the use of human normal immunoglobulin and MMR vaccine as postexposure prophylaxis. DESIGN: Review of literature and of laboratory confirmed measles cases. SETTING: England and Wales and countries with a similar measles epidemiological profile. PATIENTS: Women of childbearing age and infants. MAIN OUTCOME MEASURES: The risk of measles, maternally derived measles antibody levels and the response to measles containing vaccines in infants. RESULTS: By 4 to 5 months of age, only 28-45% of infants born to women from highly vaccinated populations have protective levels of measles antibody. In the postvaccine era, between 74% and 80% of infants vaccinated between 6 and 9 months respond to vaccine, and around 67% have clinical protection from measles vaccination. CONCLUSION: This study suggests that many infants being born in the UK will become susceptible to measles before 6 months and will be able to respond to vaccine between 6 and 9 months of age. It is proposed that current guidance is changed to recommend passive immunisation with human normal immunoglobulin for most infants exposed to measles below 6 months of age. For infants aged 6 months or over exposed to measles, vaccination with MMR may be given.
Authors: Alex Keenan; Sam Ghebrehewet; Roberto Vivancos; Dan Seddon; Peter MacPherson; Daniel Hungerford Journal: BMJ Open Date: 2017-03-30 Impact factor: 2.692