“Although very few Americans have developed serious swine flu complications, those who have are surprisingly young, United States health officials said Wednesday.
Across the United States, the number of confirmed cases rose to 642 in 41 states, up from 408 on Tuesday. Illinois now has the most confirmed cases, with 122, surpassing New York with 97.
Dr. Besser said that might be because Illinois was testing more. He said that Mayor Michael R. Bloomberg, on a visit to the C.D.C. earlier, had been asked by a reporter why New York had been surpassed, and had answered: “You want 200 more cases? We’ll test 200 more people.”
At a W.H.O. news conference, Marie-Paule Kieny, chief of the W.H.O.’s vaccine research initiative, estimated that the world’s vaccine makers had the capacity to make a maximum of 1.2 billion doses of a new H1N1 vaccine within six months after getting a seed vaccine, which the C.D.C. is now working on.”