(a) Six areas, which were administrative regions of six branches of the Bureau of National Health Insurance of Taiwan, including Taipei (1), Northern (2), Central (3), Southern (4), Kao-Ping (5), and Eastern (6). (b) Significant correlation between case numbers () of hospitalized patients with non-typhoidal Salmonella infections in the six areas and average temperature (°C) (◆) of six representative cities: (A) Taipei city, (B) Hsinchu city, (C) Taichung city, (D) Tainan city, (E) Kaohsiung city, and (F) Hualien city.