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U.S. health experts cautioned Friday that the apparent discovery of the Zika virus in saliva and urine from people in Brazil does not necessarily mean the virus can be spread by more casual contact with infected people, such as through kissing.

"I think we need to be careful that don't we jump to any conclusions about transmissibility," Anthony Fauci, who leads the National Institute of Allergy and Infectious Diseases, said during an interview on NPR's Morning Edition.

The leaking gas storage well near the Los Angeles neighborhood of Porter Ranch might be capped earlier than originally anticipated, a state official told residents on Thursday.

Wade Crowfoot, an adviser to California Gov. Jerry Brown, said the utility that owns the well is expected to begin the final phase of the fix on Monday, The Associated Press reports. The Southern California Gas Co. is currently drilling a relief well to intercept the leaking well — and once it reaches its destination, workers should be able to seal up the leak in about five days.

Genetics researchers often discover certain snips and pieces of the human genome that are important for health and development, such as the genetic mutations that cause cystic fibrosis or sickle cell anemia. And scientists noticed that genetic variants are more common in some races, which makes it seem like race is important in genetics research.

The cystic fibrosis drug Orkambi can help people with specific genetic mutations breathe better, but treatment with the pill comes with a hefty sticker price — $259,000 a year.

Orkambi, which was approved by the Food and Drug Administration last July, is expected to take almost $36 million from California's general fund this fiscal year and next. That cost estimate doesn't include any discounts the state may receive from drug manufacturers.

The Zika virus has gone from an obscure disease to an international public health emergency.

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