Indoor relative humidity shapes influenza seasonality in temperate and subtropical climates in China

• DOI: 10.1016/j.ijid.2022.11.023
• Publication Date: 2022-11-22T07:13:49Z
• Authors: Hao Lei; Mengya Yang; Zhaomin Dong; Kejia Hu; Tao Chen; Lei Yang; Nan Zhang; Xiaoli Duan; Shigui Yang; Dayan Wang; Yuelong Shu; Yuguo Li
• Keywords: Seasonality; Humid subtropical climate

The aim of this study was to explore whether indoor or outdoor relative humidity (RH) modulates the influenza epidemic transmission in temperate and subtropical climates.In study, daily temperature RH 1558 households from March 2017 January 2019 five cities across both regions China were collected. City-level 2013 collected weather stations. We first estimated effective reproduction number (Rt) then used time-series analyses relationship between indoor/outdoor RH/absolute Rt influenza. Furthermore, we expanded measured 1-year data into 5 years same method examine influenza.Indoor displayed a seasonal pattern, with highs during summer months lows winter months, whereas fluctuated no consistent pattern regions. followed U-shaped regions, not observed Rt. In addition, may be better indicator for than absolute humidity.The findings indicated that driver seasonality locations China.