BREAKING: World Health Organization calls for a delay in coronavirus vaccine booster shots to allow vaccine access to struggling countries. The WHO says the goal is to focus on enabling at least 10% of the population of every country to be vaccinated. Top U.S. health officials have said there is not yet enough data to support booster shots, even for the elderly and immunocompromised. -- A fourth wave of COVID-19 is threatening to overwhelm U.S. hospitals in regions where large swaths of unvaccinated people provide little resistance to the highly contagious delta variant. Nowhere is the strain more apparent than Florida, which reached a new peak Tuesday of 11,515 people hospitalized with COVID-19, according to data from the U.S. Department of Health and Human Services. Hospitals in Jacksonville and Orlando last week crashed through their pandemic peaks, and hospitals in Miami-Dade County are at or approaching record coronavirus hospitalizations this week, said Mary Mayhew, CEO of Florida Hospital Association. And cases continue to surge with 110,477 residents testing positive for the COVID-19 virus for the week ended July 29, foreshadowing more people needing hospital care in the weeks ahead.