Fig. 1From: Results from the centers for disease control and prevention’s predict the 2013–2014 Influenza Season ChallengeForecasted start week of the 2013–2014 influenza season, by forecast date, United States (n = 13). Forecasts presented here are from teams that successfully completed the CDC Predict the 2013–2014 Influenza Season Challenge. The start of the season was defined as the first surveillance week in ILINet where the number of visits for ILI divided by the total number of patient visits (the ILINet percentage) was above the national baseline value of 2.0 % and remained there for at least two additional weeksBack to article page