Jesse Williams, Sarah Drew

The doctors of Grey Sloan Memorial will learn the hard way that they are definitely not immune to getting sick!

First Look: See photos of Isaiah Washington's return to Grey's Anatomy

When the flu strikes Grey's Anatomy on Thursday (9/8c on ABC), the docs will struggle to stay on their feet. Who will make it through the shift without dropping? Check out an exclusive sneak peek to see how Jackson (Jesse Williams) handles getting sick:

Grey's Anatomy airs Thursdays at 9/8c on ABC.