Nope, not a sick out. The pilots have recently signed a contract and the flight attendants just reached an agreement for a new contract. It really was the flu that hit the Horizon pilots/flight attendants pretty hard. The airport folks were having staffing issues as well (heck, my office is having staffing issues in the last week or so) but boy was it rough to rebook all those passengers! We ended up having to mando people in rez to get the flights rebooked and upsize a lot of flights to get all the customers where they needed to go. It was a tough couple of days.