Bacterial extracts used to treat respiratory infections could be a new way to treat Covid-19 infection, says a team of researchers at the UArizona College of Medicine – Tucson. Their recent research, published in the Journal of Allergy and Clinical Immunology, showed that a specific combination of bacterial extracts known as OM-85 could reduce the ability of coronavirus to attach to the human lungs. The researchers stressed the importance of their study as coronavirus binds to receptors including the angiotensin converting enzyme 2 (ACE2) receptor on the outer membranes of lung cells and that “without that initial attachment – the key fitting into a lock – the entire infectious process is derailed and blocked”.