A no-frills nasal spray could potentially provide effective protection against “deadly respiratory infections” and Covid-19, tests on mice suggest. In findings published in the journal Advanced Materials, a team of Massachusetts-based medics and scientists said their “radically simple” Pathogen Capture and Neutralizing Spray (PCANS), could be a “promising daily-use prophylactic against respiratory infections.” “PCANS has the potential to provide an additional layer of protection against respiratory infections when traditional measures like masks and vaccines fall short,” said corresponding aut…