+1 means 0.01 to 1.99 weeks remaining in the injury, so you almost always will have TWO physical weeks from +1 to healed. All the other injured indications (+2 means 2.00 to 2.99, +3 means 3.00 to 3.99) normally only take ONE physical week to progress (so if you went +3 to +2 on Tuesday, I would expect +2 to +1 the following Tuesday, and +1 to healed TWO more Tuesdays after that).