Impact of stringent non-pharmaceutical interventions applied during the second and third COVID-19 epidemic waves in Portugal, 9 November 2020 to 10 February 2021: an ecological study.

ABSTRACT: BackgroundNon-pharmaceutical interventions (NPIs) were implemented worldwide to control the spread of SARS-CoV-2.AimTo evaluate the impact of tiered NPIs and a nationwide lockdown on reduction of COVID-19 incidence during the second and third epidemic waves in Portugal.MethodsSurveillance data on laboratory-confirmed COVID-19 cases were used to conduct an interrupted time series analysis to estimate changes in daily incidence during a second wave tiered NPI period (9 November-18 December 2020), and a third wave lockdown period without (15-21 January 2021) and with school closure (22 January-10 February 2021).ResultsSignificant changes in trends were observed for the overall incidence rate; declining trends were observed for tiered NPIs (-1.9% per day; incidence rate ratio (IRR): 0.981; 95%

SUBMITTER: Torres AR 

PROVIDER: S-EPMC9198658 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature