U.K., Sept. 29 -- Scientists are working on a nasal spray that could prevent Covid-19. Researchers from the University of California have created a molecule they believe to be one of the most most powerful anti-coronavirus compounds tested so far.

Their research has found that the molecules can trigger an immune response that releases a substance called INNA-051. This in turn activates a number of processes including the release of cytokines, a type of protein capable of stopping the virus from replicating and attaching itself to healthy cells.

The researchers developed this into an aerosol formula, and published their findings online. Though not yet peer reviewed, they believed the formula could be used as a nasal spray or inhaler that...