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Fax Facts - May 22, 2019

Attention: Physicians, Nurse Practitioners, Hospitals - Emergency Rooms / Infection Control / Occupational Health, Walk-In Clinics, Long-Term Care Homes, Retirement Homes, EMS, Corrections

RE: Measles Immunization

Based on recent reports of measles activity, please ensure all of your patients are immunized according to the Publicly Funded Immunization Schedule for Ontario.

Travel Immunization

As per the Canadian Immunization Guide (CIG), the following is recommended prior to travelling to areas of known measles activity:

• Infants 6 to 11 months of age: one dose of MMR (two additional doses are required at ≥ 1 year of age)

• Individuals born in or after 1970: two doses of MMR

• Adults born before 1970: one dose of MMR

To ensure 2 doses of MMR before travel, children < 4 years of age who have received one dose (according to the routine schedule) should be considered for an early 2nd dose of MMR.

Note: The minimum interval between doses of measles-containing vaccine is 4 weeks. Advice regarding immunization for travelers should be personalized based on the individual’s health history and travel itinerary.

Unknown Immunization Status: Immunization vs. Serology

If a patient’s immunization records are unavailable, immunization with measles-containing vaccine is preferred, rather than ordering serology to determine immune status. This avoids the potential for false positive results, reduces the risk of missed opportunities for immunization and is consistent with advice from the CIG. Please note this does not apply to specific occupational groups such as healthcare workers who require either documentation of immunization or serologic proof of immunity.