Without a nasal vaccine, the U.S. edge in fighting Covid is on the line

India, Russia and Iran have authorized nasal vaccines. And while none of those have yet been proven to stop Covid transmission, officials say the U.S. could find itself at a global disadvantage, particularly if a deadlier variant emerges.

“Intranasal vaccines — vaccines that are variant-resistant — those are critical tools to have in the toolbox for protecting Americans, not just for Covid but also for future pandemics and also for future biosecurity threats,” Ashish Jha, the administration’s Covid-19 response coordinator, told POLITICO.

Researchers working . . .