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What are probiotics?   01:16 If you take antibiotics, there's  a good chance  you'll also get diarrhea. Antibiotics kill harmful bacteria that cause disease. But they also cause collateral damage to the microbiome, the complex community of bacteria that live in our gut. This results in a profound, though usually temporary, depletion of the beneficial bacteria. One popular strategy to mitigate the disruption is to take a probiotic  supplement  containing live bacteria during, or following, a course of antibiotics. Health effects of probiotics: Where do we stand? The logic is simple: beneficial bacterial in the gut are damaged by antibiotics. So why not replace them with the "beneficial" bacterial strains in probiotics to assist gut bacteria returning to a "balanced" state? But the answer is more complicated. There is currently  some evidence  that taking probiotics can prevent antibiotic-associated diarrhea. This

(CNN) Climate change is here and affecting our health, with extreme heat in particular also having effects on productivity, food supply and disease transmission, a new global report finds. More people than ever are vulnerable to heat exposure globally, and numbers are rising, according to The Lancet Countdown on Health and Climate Change  report  by an international group of researchers, published Wednesday. It comes just days after climate reports from the US government and the United Nations said that greater action on climate change is needed, with the UN report showing that in  2017 , the highest levels of carbon were emitted globally. Older people in Europe and the Eastern Mediterranean are most vulnerable because of larger aging and urban populations there. The latest report estimates that 42% of over-65s in Europe and 43% in the the Eastern Mediterranean are already vulnerable to heat exposure; 38% of this group is vulnerable in Africa and 34% in Asia. Th

Scientist claims first gene-edited babies   Hong Kong (CNN) The Chinese government has ordered an "immediate investigation" into the alleged delivery of the world's first genetically edited babies, as experts worldwide have voiced outrage at such use of the technology. The pushback comes amid claims made online by scientist He Jiankui that twin girls had been born with DNA altered to make them resistant to HIV, a groundbreaking move that could spark huge scientific and ethical dilemmas. He, a professor at Southern University of Science and Technology in Shenzhen, claims that his lab had been editing embryos' genetic codes for seven couples undergoing in-vitro fertilization. In a video posted to  YouTube on Monday , the Chinese researcher said that one of the pregnancies had been successful and that ostensibly healthy twin girls Lulu and Nana had been born "a few weeks ago." Scientists edit disease-causing gene mutation in human

(CNN) The US Centers for Disease Control and Prevention warned US consumers on Tuesday to not eat  romaine lettuce,  as it may be contaminated with E. coli. Thirty-two people, including 13 who have been hospitalized, have been infected with the outbreak strain in 11 states, according to the CDC. One of the hospitalized people developed hemolytic uremic syndrome, a potentially life-threatening form   of kidney failure. No deaths have been reported. People have become sick in California, Connecticut, Illinois, Massachusetts, Maryland, Michigan, New Hampshire, New Jersey, New York, Ohio and Wisconsin. The Public Health Agency of Canada has identified an additional 18 people who have become sick with the same strain of E. coli in Ontario and Quebec. Content by Netflix House of Cards Taking a Tally on “Her Turn” A recent approval poll of House of Cards president Claire Underwood reveals viewers' feelings about iron-fisted leaders. We also explore the lay