Next-generation COVID-19 vaccines that offer protection against multiple variants of the virus will likely be available within the next few weeks, White House COVID-19 response coordinator Ashish Jha said, and would ideally be offered to all adults but supplies are limited due to lack of congressional funding. “We’re going to know more about this in the upcoming weeks, and these vaccines will become available by early to mid-September,” Jha said Tuesday (Aug. 16), speaking at a virtual event hosted by...