Notre Dame players and staff members are dealing with a "flu or a virus" ahead of Thursday night's College Football Playoff semifinal against Penn State, a school official confirmed in a statement to CBS Sports' Brandon Marcello.

Just four teams remain in pursuit of a college football national championship. It all gets underway later tonight, when Notre Dame takes on Penn State in the Orange Bowl. The winner of that game will face the winner of Friday night’s Cotton Bowl Classic between Texas and Ohio State.

Notre Dame now heads to the Orange Bowl where it will take on Penn State for a spot in the national championship. Notre Dame fans and haters alike were ecstatic following the huge victory and took to social media to react. Below are some of the best social media posts following the MASSIVE victory!