ScienceCOVID-19 faulty testingTo play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoScienceConor Dillon | Gabriel Borrud01/07/2021January 7, 2021From the very beginning, testing for COVID-19 was one of the most essential - and challenging - aspects of controlling the spread of the disease. Even after the swab is taken and the results are in, they can't always be trusted. Why?https://p.dw.com/p/3neJJAdvertisement