week, we begin it watching the flu move across the country. Tonight, we're seeing the effects of the virus particularly in the work place. And here's abc's dr. Richard besser on that. Reporter: The office is now a flu obstacle course. I'm sitting in my car now taking refuge from people at my work who have come in coughing and sneezing. Constantly washing my hands. Since I'm in sales, I press the flesh a lot and come into contact with a lot of people. All of my coworkers have been sick this season. Reporter: Watch how many touch a resolving door into the office. 14 in four minutes. So, what is a healthy worker to do? You can wipe down any shared phones, keyboards. Wash your hands. But the flu is really about the air that you breathe. An office meeting. One cough could send a cloudle of thousands of droplets into the shared air. And the droplets can stay in the air for 15 to 30 minutes, so, the next people that walk into this room will breathe in the flu. Try phone meetings. Don't hang out at that water cooler. Stay away from people. The smartest way to head off the flew is this. If you are sick, don't go to work. Dr. Richard besser, abc news, new york.