Stephanie Nolen

Climate change, civil conflict and growing resistance to insecticides and treatments are all contributing to an alarming spread of cases.

Gilead Agrees to Allow Generic Version of Groundbreaking H.I.V. Shot in Poor Countries

The decision is a crucial step in getting shots to the Democratic Republic of Congo, the center of the outbreak.

Fatalities spiked 71 percent last year, far outpacing the 13 percent rise in cases, the World Health Organization said.

The country at the center of a global health emergency is struggling even to diagnose cases and provide basic care.

Drugmakers have supplies ready to ship that are necessary to stop a potential pandemic. But W.H.O. regulations have slowed access.

After years of delay, millions of malaria vaccines are being supplied to children in Africa. Tens of thousands died waiting.

Methods such as hormonal implants and injections are reaching remote areas, providing more discretion and autonomy.

The excruciating mosquito-borne disease is surging in much of the world. Federal health officials urged physicians to watch for new cases in the United States.

An injection given just twice a year could herald a breakthrough in protecting the population that has the highest infection rates.