How Often Do Health Insurers Say No to Patients? No One Knows.
Insurers’ denial rates — a critical measure of how reliably they pay for customers’ care — remain mostly secret to the public. Federal and state regulators have done little to change that.
How Polio Crept Back Into The U.S.
U.S. public health agencies generally don’t test wastewater for signs of polio. That may have given the virus time to circulate silently before it paralyzed a New York man.