Repeated booster shots and next-generation vaccines that protect against new variants will be the best way to decrease COVID-19 cases, White House COVID-19 response coordinator Ashish Jha said as the Centers for Disease Control and Prevention released new guidelines that loosen some recommendations for preventing contagion while suggesting congregate settings like long-term care facilities might want to continue testing asymptomatic individuals. The agency has dropped mentions of a six-foot social distancing benchmark, a five-day isolation period for unvaccinated people who...