Doctors are reporting the first case in the U.S. of a bacteria that is resistant to antibiotics often used as a last resort. The germ was found in a 49-year-old Pennsylvania woman with a urinary tract infection.
The Food and Drug Administration has issued sweeping regulations that for the first time assert federal authority over electronic cigarettes, which have become increasingly popular, especially among young people.
Disease detectives from the U.S. Centers for Disease Control and Prevention begin their crucial effort on the ground in Brazil to firmly establish whether the Zika virus is really causing terrible birth defects.
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.
British regulators are giving scientists the first government sanction to edit DNA in human embryos. Scientists want to do this to learn more about human development, but critics fear it will lead to designer babies.
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