A clinic in St. Louis County has vaccinated about 5,400 people against swine flu in a single day.

Ten-thousand doses of the vaccine had been available at the clinic Saturday at five St. Louis County High Schools. The unused doses will be used later.

St. Louis County Department of Health Director Dolores J. Gunn said she was pleased with the turnout.

The vaccines are being offered first to those deemed most at risk. That includes pregnant women, children from six months to 4 years, caregivers of babies under six months of age, older youths with health problems and health care workers.

Gunn says that once more vaccine has been received, the restrictions will be eased.