The University of Maryland Health Center said it had learned from 22 confirmed cases of adenovirus students on Friday. In four cases, tests showed that adenovirus 7 is present, which can lead to more severe disease than other strains.
The death of a student from Maryland has been linked to an adenovirus infection.
According to the Health Center 22 Confirmed cases include some students who were previously ill in November but have now recovered.
In a statement released on Friday, the health center distinguished between adenoviruses causing colds, which are common at this time of year, and a dangerous strain known as adenovirus 7. He said that strain had appeared in four samples for testing.
Adenovirus 7, it says, can cause more serious illnesses, especially in patients with chronic medical problems or disease-impaired immune systems or by medicine.
For her, the health center said, "It's extremely important" not to ignore flu-like symptoms and see a doctor within 48 hours of the onset of symptoms.
When describing flu-like symptoms, the announcement stated high fever and cough / sore throat and vomiting / diarrhea.