Chiron and Aventis Pasteur together made about 80 million doses , ordinarily enough for U.S. demand , The Associated Press reported .
The companies , Chiron and Aventis Pasteur , together made about 80 million doses of the injected vaccine , which ordinarily would have been enough to meet U.S. demand .
At least 150 people are scheduled to testify at the hearings in Gaithersburg , Md . , on Tuesday and Wednesday , with experts and activists lining up on each side .