The typical recommendation for children receiving flu shots for the first time, H1N1 or seasonal, is to get two of them so that the immune system is able to create enough antibodies to provide protection.
The Australian researchers tested 370 children, ages 6 months to 9 years. The children were randomly assigned two doses of the vaccine at different doses. Over 90 percent of the children showed protective immunity after the first dose.
It is important to note that all of the Australian children received doses higher than the standard dose of 7.5-microgram. (They received 15-microgram and 30-microgram doses.)
Health experts in the U.S. state that more research is needed to know if only one dose of the standard 7.5-microgram vaccine is sufficient, and in the meantime, that parents should continue to get two doses of the vaccine for their children.
For more information, visit www.flu.gov