https://apnews.com/0b8b3fa92a024726251996acbced6ecf

COVID-19 vaccines are saving an untold number of lives, but they can't stop the chaos when a hugely contagious new mutant bursts on the scene, leading people to wonder: Will we need boosters every few months? A new vaccine recipe? A new type of shot altogether?

That's far from settled, but with the shots still doing their main job many experts are cautioning against setting too high a bar.