Alberta’s routine childhood immunization schedule is changing
 
Effective January 1, 2021 the second dose of MMRV (Measles, Mumps, Rubella, Varicella) vaccine will be offered at 18 months of age with the fourth dose of DTaP-IPV-Hib (Diphtheria, Tetanus, Acellular Pertussis, Polio, Haemophilus influenza type b).

MMRV is currently offered with the dTap-IPV preschool booster at 4 to 6 years of age. The primary rationale for moving the second dose to 18 months is to enhance measles protection in children between the ages of 12 months and four years.
 
Administering the second dose at 18 months:
  • corrects primary vaccine failure sooner for measles,
  • provides more protection against measles in preschool-aged children,
  • has the potential to improve vaccine coverage rates,
  • may limit breakthrough varicella disease and outbreaks in preschool children, and
  • facilitates disease follow-up and contact tracing in the event of a confirmed measles case.
 Based on scientific research:
  • long-term immunity is not notably impacted by this schedule change and
  • there is no difference in adverse events observed between the two age cohorts (18 months and four to six years).
 A number of jurisdictions in Canada currently provide the second dose of MMRV at 18 months.
 

    

© 2020 Alberta Medical Association; All rights reserved

The opinions expressed in AMA publications are those of the authors and do not necessarily reflect the opinions or positions of the Alberta Medical Association, its Board of Directors or members.

The Alberta Medical Association does not assume responsibility or liability for damages arising from any error or omission or from the use of any information or advice contained in these materials. Advertisements included in our publications are not necessarily endorsed by the Alberta Medical Association.

The Association reserves the right to edit any submissions that are accepted to appear in any of our publications or platforms. Please consult our editorial guidelines for tips on submissions or advertising.

Our mailing address is:
12230 106 Ave NW
Edmonton AB T5N 3Z1
Canada