OTTAWA, Nov. 12 (Xinhua) -- Healthy children between the ages of three and nine need only one half-dose of adjuvanted vaccine to protect them from the A/H1N1 flu, the Public Health Agency of Canada (PHAC) suggested Thursday.

    The PHAC originally requested children of this group to receive two half-doses of the vaccine, but it changed that policy after analyzing research from Europe as well as opinions from pediatricians, experts in vaccine, and others, Dr. David Butler-Jones, Canada's Chief Public Health Officer, said in a news release Thursday.

    Under the updated recommendations of the PHAC, kids between six months and three years of age should still receive two half-doses of vaccine, administered at least 21 days apart.

    Children between three and nine who have chronic health conditions, such as asthma, lung disease, diabetes, and other conditions should also still receive two half-doses.

    Children over the age of 10 still need just one full dose of vaccine.

    Late last month, the World Health Organization said a single half-dose of vaccine was enough to immunize children under the age of 10.

Special Report:  World Tackles A/H1N1 Flu