Richard Knox

When Susy Mansfield needed a hip replacement in 2009, her orthopedic surgeon chose a relatively new and untested kind of artificial hip made entirely of metal.

"He said, 'You're young. Metal is good for younger people. It's going to last a lot longer,' " says Mansfield, who was 57 at the time.

The vaccine — $417,000 worth of it — is stacked high in refrigerated containers to protect it from the Haitian heat.

Hundreds of health workers are trained and ready to give the vaccine. They're armed with programmed smartphones and tablet computers to keep track of who has been vaccinated and who needs a second dose.

And 100,000 eager Haitians, from the teeming slums of Port-au-Prince to tiny hamlets in Haiti's rice bowl, have signed up to get the vaccine.

Researchers have nailed down something scientists, government officials and agribusiness proponents have argued about for years: whether antibiotics in livestock feed give rise to antibiotic-resistant germs that can threaten humans.

It's a new kind of brinksmanship for U.S. doctors: caring for patients with life-threatening diseases when the supply of critical drugs threatens to disappear.

The Food and Drug Administration says counterfeit Avastin, a costly drug cancer drug, has made its way to doctors in the United States.