Impact of temperature and relative humidity on the transmission of COVID-19: a modelling study in China and the United States.

For example, the study by Merow and Urban shows that ultraviolet light is associated with a decreasing trend in COVID-19 case growth rates. 26 In contrast, other studies claim no association between COVID-19 transmissibility and temperature and ultraviolet light 27 or a positive association between temperature and daily confirmed cases. 28 29 Since the COVID-19 outbreak has lasted for less than a year, we do not have multiyear time-series data to estimate a stable serial cointegration between meteorological factors and certain indicators of COVID-19 transmissibility.

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