Children under the age of 10 will need two doses of the new swine flu vaccine, health officials reported on Monday.

A single dose of the vaccine is enough for older kids and adults, but for the younger set, two doses will be required, 21 days apart, in order for it to be effective as their immune systems are not fully mature.

"Immunologically this is acting like seasonal flu and we are very pleased with that," said Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases. "The response in younger children is less robust, but that is not unexpected."

So far, trials done on the vaccine have been “encouraging” with over 75 percent of the children developing immunity.

"Overall, this is very good news for the vaccination program," Fauci said. "76 percent is not bad at all - it's quite good I think." (NY Daily News)

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