Extreme Ghostbusters (1997)

S1E1 Darkness at Noon (1)

Construction workers accidentally unleash Achira, a ghost capable of spreading illness. The only group that could tackle this threat is the Ghostbusters, but they've disbanded long ago, leaving only Egon in New York City. Now teaching at a college, he discovers that his four students might be just the allies he needs to confront this malevolent spirit.