BBC News Published image captionLockdown saw a fall in admissions for violent injury outside the home in Cardiff, the study found Emergency teams saw a "rapid and sustained" fall in violent injuries during the first Covid lockdown, a study by Cardiff University has found. However, there was no change in domestic violence admissions at Cardiff's emergency department. The University Hospital of Wales said it saw the average weekly number of violent injury admissions drop from 28.4 pre-lockdown to 16.5. There was also a 92% reduction in weapon use, according to the study. Researchers from Cardiff University's Crime and Security Research Institute (CSRI) and the US Centers for Disease Control and Prevention studied data from Cardiff's only emergency department from March to June 2020 and compared it to weekly data from January 2019 onwards.