Hundreds of students and/or faculty were potentially exposed to tuberculosis at Fresno City College, and the school’s health center has sent out alerts to people who may at risk.

Initial reports put the number of exposures at some 300, but the total still isn’t clear.

Fresno State officials said there were no cases of TB reported at Fresno State.

“The Student Health and Counseling Center will continue to monitor this situation closely,” said Director Wendy A. Oliver, a registered nurse.

“I can tell you that there were less than 300 students affected,” said Kathy Bonilla, public information officer at Fresno City College. “When this kind of situation occurs, it is our practice to notify the students and offer free testing. We were initially notified by the Public Health Department of the situation…”

Students that may have been affected were sent an email regarding the exposure and the free testing.

“You may have been exposed to Tuberculosis (TB) when you attended specific classes at Fresno City College in Sp2016,” the email read.

TB is a bacterial infection that attacks the lungs, and it can be fatal if untreated.

“Tuberculosis (TB) is caused by a bacterium called Mycobacterium tuberculosis,” the Fresno County Public Health Department’s website said. “The bacteria usually attack the lungs, but TB bacteria can attack any part of the body such as the kidney, spine and brain. If not treated properly, TB disease can be fatal.”

Oliver said catching TB isn’t as easy as a hand shake.

“TB is spread through the air from one person to another. The bacteria are put into the air when a person with TB disease of the lungs or throat coughs, sneezes, speaks or sings” Oliver said. “People with TB disease are most likely to spread it to people they spend time with every day. This includes family members, friends and coworkers or schoolmates. TB is not spread by shaking someone’s hand, sharing food or drink, touching bed linens or toilet seats, sharing toothbrushes or kissing.