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Angelica Pereira feeds her daughter Luiza, who was born with microcephaly, at her mother's house in Santa Cruz do Capibaribe, Brazil.

Zika Virus Can Cause Brain Defects In Babies, CDC Confirms

U.S. health officials say they are now convinced that Zika virus can target the developing brain before birth, leading to a severe type of microcephaly and other brain abnormalities.

Supporters watch as New York Gov. Andrew Cuomo speaks to promote his paid family leave initiative at a rally in Manhattan on March 10.

Paid Family Leave Advocates Celebrate A Big Week, But The Battle's Not Over

In New York and San Francisco, lawmakers have taken groundbreaking steps toward more generous leave policies. Still, some business leaders worry how much paid family leave will cost them.

People in Pinar del Rio, Cuba, make their way through a fumigation fog that's meant to kill the mosquito that transmits the Zika virus.

White House Says It Will Cut Ebola Funding To Address Zika

The Obama administration requested $1.9 billion in emergency funds to prepare for Zika, but Congress has yet to respond. Now the White House plans to divert funding intended for Ebola.

Dr. Dorry Segev (right), of Johns Hopkins Medicine, led the team of doctors that transplanted an HIV-positive liver and kidney into two different HIV-positive patients this month.

New Source Of Transplant Organs For Patients With HIV: Others With HIV

The organ donor and both recipients in the procedure this month were all HIV-positive — a first in the U.S. Using HIV-positive organs for some patients could enable a thousand more transplants a year.

Fatty plaque (shown here in yellow) blocks about 60 percent of this coronary artery's width. The increasing thickness of artery walls is just one factor that can increase vulnerability to a heart attack or stroke.

Possible Heart Benefits Of Taking Estrogen Get Another Look

Evidence has ping-ponged over the decades on the effects of hormone therapy on a woman's arteries. The latest study suggests a brief stint on hormones might be helpful — if given at the right time.

Possible Heart Benefits Of Taking Estrogen Get Another Look

Evidence has ping-ponged over the decades on the effects of hormone therapy on a woman's arteries. The latest study suggests a brief stint on hormones might be helpful — if given at the right time.

In 2010, scientists plopped the genetic material of one Mycoplasma bacterium into another type to create the self-replicating cells shown above. Six years later, they've come out with an even simpler synthetic organism that has fewer genes.

Scientists Build A Live, No-Frills Cell That Could Have A Big Future

In engineering the cell, researchers paired away nearly all genes that weren't essential to life. It might eventually serve as a basic framework for different sorts of cellular factories, they say.

To collect sap from a date palm tree, a man peels bark at the top of the tree and attaching a pot to collect the liquid.

Disease Detectives Find A Really Good Reason Not To Drink Date Palm Wine

Every year, little clusters of Nipah virus break out in Bangladesh. And it wasn't from the usual cause — drinking raw sap from date palm trees. So what's up?

Health workers collect the body of a cholera victim in Petionville, Haiti, in February 2011. The disease first appeared on the island in October 2010, likely introduced by U.N. peacekeepers from Nepal, possibly a single individual.

Why The U.N. Is Being Sued Over Haiti's Cholera Epidemic

The demands: a U.N. apology for bringing the disease to the island, reparations for victims, repairs to the water system. Meanwhile, a study shows the toll is far worse than previously thought.

Going slow isn't necessarily the best route to ditching cigarettes.

To Quit Smoking, It's Best To Go Cold Turkey

Quitting abruptly is more effective, a study finds, even for people who'd rather phase it out gradually.

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