Washing hands and covering coughs and sneezes are great ways to keep yourself from spreading germs and, hopefully, not get sick.
But, sometimes we catch a cold or contract a virus without realizing where we got it from.
A new app, called SickWeather , is hoping to map out illnesses as they attack -- literally.
The app follows social media conversations that allude to people being sick--coughs, flu, upset stomach, allergies--and maps them out.
Looking at April 30, according to the app, the Phoenix-area is suffering from allergies, cough and the common cold.
The app is all free to download in your app store.