WASHINGTON (Reuters) – The U.S. government may end up throwing away unused doses of swine flu vaccine if people cannot get it soon enough, the director of the U.S. Centers for Disease Control and Prevention said on Tuesday.

Wait. Isn’t there a shortage?

Members of Congress questioned whether federal officials were too rosy in their estimates of how much vaccine would be available and when, and companies said they were still struggling to produce immunizations against H1N1.