The Centers for Disease Control and Prevention confirmed that a Yale student was diagnosed with a probable case of meningitis B, the Yale Daily News reported on Friday.
The student has already been discharged from the hospital after reporting there on Thursday with headaches and vomiting.
No other cases have been reported at Yale so far.
Medical services at Yale will begin to offer a vaccine for meningitis B at no cost to those with the college's health insurance. Most of the students who have been in contact with the affected student have taken antibiotics.
Yale students are required to show proof of immunization for a vaccine that protects against four types of meningitis under Connecticut law, but meningitis B is not among them.
The Bexsero vaccine for meningitis B was approved in January.