Nitric oxide, a two-part nanomolecule made in the cells that line the blood vessels, is being examined as an experimental treatment for the disease caused by the novel coronavirus. Studies show it plays a role in helping to relax blood vessels and open the airways in the lung — critical in treating those with advanced cases. Read more here.

Read more on clinical trials for COVID-19 here: Drugs and vaccines for COVID-19: List of authorized clinical trials