>> reporter: over how many days? >> just today. [ coughing ] >> reporter: after the coughing and sneezing, a struggle just to breathe. >> hi, i'm dr. besser. >> hi. >> reporter: 2-year-old gemma's parents notice first thing in the morning. >> having trouble breathing. >> reporter: by 6:00 at night, so many sick kids here they once again brought in mobile care units to handle overflow. emergency measures to help little patients and their parents breathe easier. if you're a parent, there are two crucial things you need to do. if your child gets a cold and has any trouble breathing, take them to the doctor right away. and remember, this is contagious. good hand washing is the best way to keep them safe. dr. richard besser, abc news, new york. new details on how the federal government pressured yahoo! to give up data. newly unsealed court documents show yahoo! faced fines of $250,000 a day.