H1N1 Flu Vaccine: Dosing Recommendations

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Updated: November 13, 2009

Your child - H1N1 flu vaccine recommendations updated

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CATEGORY	DOSING RECOMMENDATION
Age 0-5 months	H1N1 flu vaccine not authorized for use
Age over 6 months and less than 3 years	2 half-doses of adjuvanted* vaccine There should be a minimum of 21 days between the 2 half-doses.
Age 3 to 9 years - Healthy children	1 half-dose adjuvanted* vaccine, for now**
Age 3 to 9 years - Children with chronic medical conditions	2 half-doses of adjuvanted* vaccine There should be a minimum of 21 days between the 2 half-doses.
Healthy people age 10 to 64 years	1 dose either adjuvanted* or unadjuvanted vaccine
People with weakened immune age 10- 64 years	1 dose adjuvanted* vaccine
People over the age of 65	1 dose adjuvanted* vaccine
Pregnant women	1 dose unadjuvanted vaccine
Pregnant women More than 20 weeks pregnant	If unadjuvanted vaccine is not available and rates of H1N1 flu are high or increasing in the community, women more than 20 weeks pregnant should be offered 1 dose of adjuvanted* vaccine.
Pregnant women With severe chronic disease	If unadjuvanted vaccine is not available and rates of H1N1 flu are high or increasing in the community, pregnant women with severe chronic disease should be offered 1 dose of adjuvanted* vaccine.
* An adjuvant is a substance that is added to a vaccine to boost the individual’s immune response. It includes naturally occurring oil (called squalene), water and vitamin E. ** These recommendations may be updated as more information becomes available.

Co-Administration Recommendations

• H1N1 flu vaccine may be administered concurrently with seasonal flu vaccine and other vaccines.
• If co-administered, injections should be given in separate limbs.
• If not given concurrently, there is no minimum interval required between the H1N1 flu vaccine and other vaccines.
• This advice is consistent with the Canadian Immunization Guide.

To find out more, visit www.fightflu.ca or call 1 800 O-Canada (1-800-622-6232)
(TTY 1-800-926-9105)