DAYTON, Ohio -- Health officials in Montgomery County are planning a large H1N1 clinic to vaccinate as many people as possible against the virus.

The clinic is happened Thursday at the UD Arena from 2 p.m. until 7 p.m. or until the vaccine runs out.

The vaccinations are free, but are being given only to people in certain target groups. Those groups include pregnant women, those people who live or work with children under six-months-old and anyone who is between 6 months and 24-year's-old.

Health care workers can also get the vaccine at this clinic including anyone between the ages of 25 and 64 with a chronic medical condition that puts them at a higher risk for flu complications.