Fig. 2From: Assessing the impact of COVID-19 interventions on influenza-like illness in Beijing and Hong Kong: an observational and modeling studyThe changes of mean temperature (a), absolute humidity (b), and relative humidity (c) from 2011 to 2021 and the stringency of 9 NPI indicators (d) from 2020 to 2021 in the Hong Kong SAR. NPI non-pharmaceutical intervention. Hong Kong SAR: Hong Kong Special Administrative RegionBack to article page