Many experts cautiously optimistic that the U.S. is headed for a better summer. But they emphasized that such a world, though plausible, is not inevitable. Its realization hinges on successfully executing the most complicated vaccination program in U.S. history, on persuading a frayed and fractured nation to continue using masks and avoiding indoor crowds, on countering the growing quagmire of misinformation, and on successfully monitoring and countering changes in the #coronavirus itself.
