SAN FRANCISCO (AP) - San Francisco is trying to crack down on electronic cigarettes that critics say aggressively target kids, with an official on Tuesday proposed what's believed to be the first U.S. ban on their sale until the federal government regulates vaping products. City Attorney Dennis Herrera said San Francisco, Chicago and New York sent a joint letter demanding that the U.S. Food and Drug Administration evaluate the effect of e-cigarettes on public health.
LONDON (AP) - Smoking high-potency marijuana every day could increase the chances of developing psychosis by nearly five times, according to the biggest-ever study to examine the impact of pot on psychotic disorder rates. The research adds to previous studies that have found links between marijuana and mental health problems, but still does not definitively pinpoint marijuana as the cause.
GENEVA (AP) - A panel convened by the World Health Organization said it would be "irresponsible" for scientists to use gene editing for reproductive purposes, but stopped short of calling for a ban. The experts also called for the U.N. health agency to create a database of scientists working on gene editing. The recommendation was announced Tuesday after a two-day meeting in Geneva to examine the scientific, ethical, social and legal challenges of such research.
WASHINGTON (AP) - A huge study suggests the Apple Watch can detect a worrisome irregular heartbeat at least sometimes - but experts say more work is needed to tell if using wearable technology to screen for heart problems really helps. More than 419,000 Apple Watch users signed up for the unusual study, making it the largest ever to explore screening seemingly healthy people for atrial fibrillation, a condition that if untreated eventually can trigger strokes.