As the case count climbs, more South Dakotans are protecting themselves from the virus. H1N1 vaccination clinics are underway in two communities and several others are scheduled for the next week.  Health officials are hoping to give out more than 3,000 doses Thursday night at the W.H. Lyon Fairgrounds.

Those targeted for the vaccine include everyone in Tier 1. That includes pregnant women, children age six months to four years, those who live with and care for infants younger than six months, and new to this clinic, health care workers and kids five to 18 years old considered high risk.

So how do you know if your five to 18-year-old is considered high risk? The CDC defines that as people with medical conditions like asthma, diabetes, chronic lung conditions like cystic fibrosis and people with weakened immune systems caused by cancer or medications.

"The ones that have had the most problems anyway are the ones that have underlying medical conditions and end up being the most affected or sick," Vice President of Sanford Clinic Terri Carlson said.

When we arrived a half hour before the doors opened, over 500 were standing in line; several had been waiting a few hours before stepping foot inside the building.

One week ago, there was extra vaccine so officials ended opening up the clinic to more people. We'll be sure to let you know if that happens again Thursday or if there are any other updates.