A test to detect Covid-19 that can be done at the point of care and gives results in 15 minutes has been given the greenlight in Europe, according to its maker, Becton Dickinson. The test should be commercially available in Europe by the end of October, the diagnostics specialist said Wednesday, as it announced its antigen test had been granted a “CE mark” in Europe, meaning it conforms with health, safety, and environmental protection standards for products sold within the region.