[Press release – not published yet] Azithromycin and doxycycline are not generally effective against COVID-19 in patients treated at home, shows PRINCIPLE trial 26 Jan, 2021 | 01:03h | UTC Azithromycin and doxcycline are not generally effective against COVID-19 in patients treated at home, shows PRINCIPLE trial – University of Oxford See also: PRINCIPLE trial finds no benefit from antibiotics, azithromycin and doxycycline for COVID-19 patients – National Institute for Health Research