Mobility restriction measures were the main tools to control the spread of COVID-19,but the extent to which the mobility has decreased remained unsure.We investigated the change in local population mobility and its co...Mobility restriction measures were the main tools to control the spread of COVID-19,but the extent to which the mobility has decreased remained unsure.We investigated the change in local population mobility and its correlation with COVID-19 infections,using 1185 billion aggregated mobile phone data records in nine main cities in China from 10 January to 24 February 2020.The mobility fell by as much as 79.57%compared to the normal days in 2020 and by 58.13%compared to the same lunar period in 2019.The daily incidence of COVID-19 was significantly correlated with local daily mobility(R2=0.77,P<0.001).The instantaneous reproduction number R(t)declined by 3%when mobility was reduced by 10%in the GLM analysis(P<0.05).Our study indicated that the decreased mobility level,driven by a mixture effect of holiday and public health interventions,could substantially reduce the transmission of COVID-19 to a low level.Our study could provide evidence of mobility restriction to control local transmission for other places facing COVID-19 outbreaks or potential next waves.展开更多
基金financial support from National Natural Science Foundation of China[grant numbers 42171400,71961137003,82103945]Research on Prevention and Control of COVID-19 in Guangdong Education Department[grant number 2020KZDZX1171]+2 种基金Natural Science Foundation of Guangdong[grant number 2021A1515011324]Natural Resources of Guangdong[grant number 202325]Shenzhen Science and Technology Innovation Commission[grant number JCYJ20190808174209308].
文摘Mobility restriction measures were the main tools to control the spread of COVID-19,but the extent to which the mobility has decreased remained unsure.We investigated the change in local population mobility and its correlation with COVID-19 infections,using 1185 billion aggregated mobile phone data records in nine main cities in China from 10 January to 24 February 2020.The mobility fell by as much as 79.57%compared to the normal days in 2020 and by 58.13%compared to the same lunar period in 2019.The daily incidence of COVID-19 was significantly correlated with local daily mobility(R2=0.77,P<0.001).The instantaneous reproduction number R(t)declined by 3%when mobility was reduced by 10%in the GLM analysis(P<0.05).Our study indicated that the decreased mobility level,driven by a mixture effect of holiday and public health interventions,could substantially reduce the transmission of COVID-19 to a low level.Our study could provide evidence of mobility restriction to control local transmission for other places facing COVID-19 outbreaks or potential next waves.
