Thousands of UF students are returning for another semester of school. And if you live in Gainesville that means congested traffic, a population increase, and waiting hours to be seated at your favorite restaurant. But while you may be annoyed, businesses and hospitals are rolling out the welcome mat.

Business owners say when students are away there's not much pay. Health officials say the number of blood donors drastically decreases. Doctors say students coming back to town doesn't just effect the community economically but also medically. They say students make up 30% of blood donations. During the school year students give 40 to 50 units of blood. But during the summer students only give 5 to 10 units.

Since the entire state is in emergency blood need. Doctors here in North Central Florida say they've had to import blood from other states. This fall LifeSouth will have a blood mobile on campus everyday.

By Gavin Johnson, WCJB TV20 News