tonight, an infectious disease specialist showed dennis nakano what to look out for. >> reporter: i'mwith dr. ronald goran to go through our newsroom to talk about the flu strings. how easy can the flu spread in a workplace like this? >> very easily. there is no barriers. somebody cause of it can go three or four feet. there you go, that's right across the barrier there. that's why when people are sick they should stay home. >> reporter: not only with coughing or sneezing but new research says just breathing out is enough for a person with the flu to spread the virus. >> influenza is contagious for 24 hours before you get sick. there has to be some mechanism if you are not coughing. so it is talking and groobreath >> reporter: the flu season is already bad but the worst is yet to come. >> we are running out of kits to test for it. >> reporter: what can you do if you are working in close quarters during the worst flu season doctors have seen for ten years. one, if you are around a lot of sick people consider taking medicine as a prophylactic and very least. >> get alcohol hand gel. you