|
?:abstract
|
-
BACKGROUND In Japan, as a countermeasure against the coronavirus disease 2019 (COVID-19) outbreak, both the national and local governments issued voluntary restrictions against going out (VRGs) from residences at the end of March 2020 in preference to the lockdowns instituted in European and North American countries. OBJECTIVE We investigated the associations in excursion information provided by Apple Inc. and estimated an effective reproduction number R(t). METHODS We regressed R(t) on a polynomial function of daily Apple data, estimated using the whole period, and analyzed sub-periods delimited by March 10, 2020. RESULTS In the estimation results, R(t) = 1.72 when VRG ceased and mobility reverted to a normal level. However, the critical level of R(t) < 1 was obtained at 89.3% of normal mobility. CONCLUSIONS Results indicate that the normal number of trips should decrease by 10% until herd immunity is achieved, but that full VRGs might not be necessary for avoiding re-emergence of the outbreak. CLINICALTRIAL
|
![[This page as RDF]](https://research.tib.eu/covid-19/static/rdf-icon.gif){kind=icon}