Health officials worldwide have a watchful eye on the Southern Hemisphere, where flu season is about to begin. How H1N1 circulates there may determine how aggressively U.S. health officials approach the flu in the fall.
Although it is far from certain that a vaccine for the bug often called swine flu will be made, some local experts said a vaccine is a must.
"They should go forward," said Paul Coussens, a virologist at Michigan State University. By fall, he said, the virus may be more virulent.
Although it is far from certain that a vaccine for the bug often called swine flu will be made, some local experts said a vaccine is a must.
"They should go forward," said Paul Coussens, a virologist at Michigan State University. By fall, he said, the virus may be more virulent.
