ATLANTA In a startling measure of just how widely a new disease can spread, researchers accurately plotted swine flu's course around the world by tracking air travel from Mexico.

ROANOKE, Va. A peanut butter maker that sells bulk supplies to institutions issued a nationwide recall as officials on Wednesday reported two more deaths associated with a salmonella outbreak. Its client Kellogg Co. later asked stores to stop selling a variety of peanut butter crackers.

MEXICO CITY Mexico said a swine flu epidemic appears to be easing, but urged citizens Saturday not to let their guard down against a virus that has killed 17 people and is spreading across Asia and Europe. Experts warned the virus could mutate and come back with a vengeance.

MEXICO CITY The swine flu epidemic spread deeper into the United States, Europe and Latin America and in Canada, back to pigs even as Mexico's health chief hinted Sunday it may soon be time to reopen businesses and schools in the nation where the outbreak likely began.

LITTLE ROCK Arkansas' first confirmed swine flu cases came from out-of-state airmen training at a military base in central Arkansas, officials said Friday. A school child in northeast Arkansas has also tested positive for the disease.

NEW YORK The swine flu virus continued spreading in New York City closing more schools and showing up in a jail while the disease also reached further into Asia among travelers returning from the United States.

ATLANTA (AP) New test results show what scientists have suspected people in their 60's and older have signs of greater immunity to the new swine flu virus.

LITTLE ROCK (AP) High levels of formaldehyde in some mobile homes purchased by the Federal Emergency Management Agency for 2005 hurricane relief will not stop efforts to use them to house victims of last week's tornadoes in Arkansas and Tennessee, officials said Thursday.

ATLANTA (AP) For those convinced that vaccines can cause autism, the sad case of a Georgia girl, daughter of a doctor and lawyer, seems like clear-cut evidence. The government has agreed to pay the girl's family for injury caused by vaccines.

CHICAGO (AP) At least one in four teenage American girls has a sexually transmitted disease, suggests a first-of-its-kind federal study that startled some adolescent-health experts.