Obama discuss swine flu efforts

WASHINGTON (AP) - President Barack Obama said the U.S. is taking "all necessary precautions" to deal with the swine flu outbreak in case it turns into "something worse."

The president spoke today with Mexican President Felipe Calderon, whose country has seen hundreds infected and at least 16 killed by the virus.

The White House said the leaders shared information on efforts to limit the outbreak. A White House official said the call, which Calderon had requested, was friendly and productive.

During his weekly radio address, Obama said because the swine flu strain is new, people haven't developed an immunity to it, making it more dangerous.

Obama noted the flu strain "can be defeated by a course of antiviral treatment." He said about 12 million courses of the treatment have been distributed to states.