Fears about swine flu have spurred more than 3,000 people so far to volunteer to take part in upcoming clinical trials of a new vaccine. That’s already more than the number scientists will need at eight different sites around the U.S. “We don’t generally ever get a response like this,” Dr. Lisa Jackson, the principal researcher in charge of the clinical trials being readied at Seattle-based Group Health Cooperative, which fielded more than a thousand calls from people in two days.

Health and Human Services Secretary Kathleen Sebelius said she is urging school superintendents around the country to spend the summer preparing for the possibility of turning schools into swine flu vaccine clinics this fall. “If you think about vaccinating kids, schools are the logical place,”

Analysts note that the pandemic couldn’t have come at a better time for Glaxo, one of the world’s largest vaccine makers. Generics have been steadily eating into the company’s margins, leaving Glaxo looking for new products to make up the shortfall.