Andrea Boyle, a university spokeswoman, said Wednesday she's not sure how many students have visited the clinics.
Student health center staff are wearing masks and signs outside direct students worried they have symptoms of swine flu to a separate entrance.
Classes are being held as usual Wednesday, but Tiffany Brooks, a 20-year-old student from Dewey Beach, Del., says a group project meeting was called off after two students expressed concern about the flu.
The university alerted students, parents, faculty and staff, about the probable cases of the illness on Tuesday night.
The symptoms of swine flu are similar to those of seasonal flu and include fever, lack of appetite, coughing and fatigue.
Delaware's Division of Public Health activated a toll-free Swine Flu Information Call Center on Wednesday morning to answer general questions. This line will be available from 9 a.m. until 5:30 p.m. each business day until further notice. The telephone number is 1-866-408-1899.