This simple recipe provides a burst of sunshine any time of year. Some high schools have postponed football seasons. Some are forging ahead. And others are in limbo, with young athletes desperate to find a way to avoid a lost season. King's College London estimates show cases have soared from the record low 1,300 reported last week, and are now at the highest since July 25. Zenefits, a high-profile San Francisco start-up specializing in health insurance, replaces its co-founder and chief executive after questions about compliance.