Jim Zarroli

Poor people who reside in expensive, well-educated cities such as San Francisco tend to live longer than low-income people in less affluent places, according to a study of more than a billion Social Security and tax records.

Poor people who reside in expensive, well-educated cities such as San Francisco tend to live longer than low-income people in less affluent places, according to a study of more than a billion Social Security and tax records.

Chipotle Mexican Grill is struggling to convince its customers it's a safe place to eat, after several outbreaks of foodborne illnesses have sickened hundreds of its customers. But no one thinks the task is going to be easy.

A 15-year-old boy died of Ebola in Liberia on Monday night, the first person in the country to perish from the disease since July, health officials say.

UnitedHealth Group, the nation's largest health insurance company, says it's considering dropping out of the public exchanges that are an integral part of the Affordable Care Act, because it's losing money on them.

"We cannot sustain these losses," CEO Stephen Hemsley said in an investor call Thursday morning. "We can't really subsidize a marketplace that doesn't appear at the moment to be sustaining itself."

Valeant Pharmaceuticals International is ending its relationship with Philidor Rx Services, because of questions raised about whether it was using the specialty pharmacy to boost sales of Valeant drugs over cheaper versions.

As a result, Philidor will shut down as soon as possible, The Wall Street Journal reported.

Earlier this month, the flooring retailer Lumber Liquidators got the kind of attention companies dread. CBS' 60 Minutes did a story saying the company's products have unsafe levels of formaldehyde, a known carcinogen.

Saturday is the day the Obama administration promised it would have HealthCare.gov working smoothly for the majority of people who need to sign up for health insurance.

As the Obama administration scrambles to fix the glitch-plagued site, experts are beginning to worry about another problem that may further impair the rollout of the Affordable Care Act.