I have just read an article by the BBC reporting that around 43,000 people in England and Wales may have been wrongly told their Covid-19 test was negative because of errors at a private laboratory. This isn’t the first time the NHS has come under fire for producing wrong test results. In 2017 an NHS Trust had a series of wrong blood in tube (WBIT) incidents in their maternity unit. Incidents like this can occur when blood samples are taken from patients and are either miscol