Mass-testing reduced Liverpool COVID-19 cases by a fifth, study finds FILE PHOTO: People queue at the coronavirus disease (COVID-19) testing centre in Liverpool, Britain November 6, 2020. REUTERS/Carl Recine reuters_tickers This content was published on July 7, 2021 - 01:25 July 7, 2021 - 01:25 LONDON (Reuters) - A mass rapid-testing scheme reduced COVID-19 cases in the English city of Liverpool by more than a fifth, researchers said on Wednesday, arguing it was an effective public health intervention despite concerns over accuracy of the devices. The community testing pilot scheme launched in November, and offered everyone in the city tests whether or not they had symptoms, in an attempt to find a new way to use testing to limit the spread of the coronavirus.