• Brazil's Health Minister Marcelo Castro speaks to the press before attending the Mercosur Health Ministers summit to address the spread of Zika virus in the region, at the Mercosur building in Montevideo, Uruguay, Wednesday, Feb. 3, 2016. The ministers of 13 countries are meeting to coordinate actions to try and fight the spread of the mosquito born virus. Castro said that efforts are being made to create a vaccine against it. (AP Photo/Matilde Campodonico)

    APNewsbreak: Few Zika samples being shared by Brazil

    RIO DE JANEIRO (AP) — U.N. and U.S. health officials tell The Associated Press that Brazil has yet to share enough samples and disease data needed to answer the most worrying question about the Zika outbreak: whether the virus is actually responsible for the increase in the number of babies born with abnormally small heads in Brazil.

  • CORRECTS TYPO IN FIRST SENTENCE TO BUTTON -German chancellor Angela Merkel  prepares to press the start button next to the head of the Max Planck Institute for Plasma Physics  Sibylle Guenter , left, and Mecklenburg-Western Pomerania governor,  Erwin Sellering, right at the  Wendelstein 7-X' nuclear fusion research center at the Max-Planck-Institut for Plasma Physics in Greifswald, Germany Wednesday Feb. 3, 2016. Scientists flipped the switch  on an experiment they hope will advance the quest for nuclear fusion, considered a clean and safe form of nuclear power.  ( Bernd Wuestneck/dpa via AP)

    Scientists to inject fuel in experimental fusion device

    GREIFSWALD, Germany (AP) — Scientists in Germany flipped the switch Wednesday on an experiment they hope will advance the quest for nuclear fusion, considered a clean and safe form of nuclear power.

  • A Sucre municipality worker fumigates for Aedes aegypti mosquitoes that transmit the Zika virus in the Petare neighborhood of Caracas, Venezuela, Monday, Feb. 1, 2016. Venezuela is reporting a jump in cases of a rare, sometimes paralyzing syndrome that may be linked to the Zika virus. (AP Photo/Fernando Llano)

    The Latest: Female airline crew can request no Brazil flight

    PARIS (AP) — The Latest on the battle against the Zika virus (all times local):

  • Boys stand on a piece of wood above sewage running below as they play outside their home in Bonito, Pernambuco state, Brazil, Saturday, Jan. 30, 2016. Zika is spread by the Aedes aegypti mosquito, which is well-adapted to humans, thrives in people's homes and can breed in even a bottle cap's-worth of stagnant water — not to mention the pools of rain water that lurk in just about every nook and cranny during the muggy summer rain season. While anyone can be bitten by Aedes, public health experts agree that the poor are more vulnerable because they often lack amenities that help diminish the risk, such as air conditioning and window screens. (AP Photo/Felipe Dana)

    Brazil officials can access all buildings to fight mosquito

    RIO DE JANEIRO (AP) — Brazil’s president has signed a measure allowing health officials access to any building to eradicate breeding grounds for a mosquito spreading the Zika virus.

  • This Aug. 8, 2008 file photo, shows embryos being placed onto a CryoLeaf ready for instant freezing using the vitrification process. In a statement Monday Feb. 1, 2016, the Human Fertilisation and Embryology Authority, Britain’s fertility regulator, has approved a scientist’s application to edit the human genetic code using a new technique that some fear crosses too many ethical boundaries. (Ben Birchall/PA via AP, File) UNITED KINGDOM OUT

    Britain approves controversial gene-editing technique

    LONDON (AP) — In a landmark decision that some ethicists warned is a step down the path toward “designer babies,” Britain gave scientists approval Monday to conduct experiments in which they will try to edit the genes in human embryos.

  • In this Jan. 29, 2016 photo, Tainara Lourenco, who's five months pregnant, stands outside her stilt home that stands over polluted water in a slum in Recife, Brazil. Lourenco became pregnant at a scary moment — the dawn of an extraordinary Zika outbreak, as authorities came to suspect that the virus was causing an alarming spike in a rare birth defect called microcephaly. "If you have to get sick you will get sick," she said. "It's everywhere." (AP Photo/Felipe Dana)

    For Brazil’s rich and poor, disparate response to Zika

    RIO DE JANEIRO (AP) — Two Brazilian women, two pregnancies, one nightmare. But two very different stories.

  • Correction: SpaceX-Hyperloop story

    COLLEGE STATION, Texas (AP) — In an early version of a Jan. 30 story on a SpaceX competition to design a Hyperloop pod, The Associated Press erroneously reported that the Massachusetts Institute of Technology is based in Boston. It is based in Cambridge, Massachusetts.

  • University admits liability in Cal player Ted Agu’s death

    SAN FRANCISCO (AP) — The University of California has admitted its negligence was a substantial factor in the death of former California football player Ted Agu.