Evanston Township High School sent out an alert to parents recently to inform them that student has been diagnosed with a bacterial infection that can be easily spread through nose and mouth secretions.
"The signs and symptoms of this infection include sudden onset of high fever, headache, vomiting, stiff neck and a rash. Sensitivity to light, sleepiness and confusion may also occur," read a statement about the infection.
"The symptoms may develop rapidly, sometimes in a matter of hours, but usually over the course of 1-2 days after exposure. As stated above, this infection is spread by direct contact with respiratory and oral secretions (saliva, sputum or nasal mucus) of an infected person."
The Evanston Health Department is working with the school to prevent the spread of the illness to people who have been in close contact with the infected student, the letter said. All people who have been in close contact with the student have been personally notified.
The school said it sent out the alert as a precaution.