An infection is roaming around Donut District, that the Donutz call "Donut Disease". When one of the donutz becomes infected, it will turn green. Once it is infected, click on it to make it go to a facility that will heal it. Since you are the head of the facility, you get a point everytime a Donut is healed. But if you wait too long, the Donutz will be too dangerous to take to the facility, which won't get you a single point.
Have fun!