Before revision:  It indicates that the arrival of summer and rainy season ] ] ] ] in the northern hemisphere can effectively reduce the transmission of the COVID-19.
After revision:  It indicates that the arrival of summer and rainy season ] ]) in the U.S.), and one percent relative humidity rise reduces R value by 0.0078 (0.0076 (95\% CI ] ] in the northern hemisphere can effectively reduce the transmission of the COVID-19.