Health Highlights: Oct. 13, 2021

U.S. will reopen its borders to vaccinated travelers from Canada, Mexico. After 19 months of pandemic closures, those who can show proof of full vaccination against COVID-19 can enter the country, starting in November. Read more

FDA gives its first approval to an e-cigarette. Even though they have been ubiquitous among Americans for a decade, they have never been approved for use by the U.S. Food and Drug Administration -- until now. On Tuesday, the agency gave its OK to Vuse's Solo e-cigarette and its tobacco-flavored nicotine, citing potential benefits to smokers. Read more

Nearly half of U.S. breast cancer patients use pot or CBD. A new study finds marijuana and hemp-derived products are increasingly popular among women battling breast cancer. Many aren't telling their doctors, however. Read more

FDA panel will debate use of booster shots for people who received Moderna, J&J COVID vaccines. Many Americans who got the Pfizer two-dose vaccine have already gotten the green light from the U.S. Food and Drug Administration to get a booster shot. On Thursday and Friday, an advisory panel will meet to mull a similar ruling for those who received the Moderna or Johnson & Johnson shots. Read more

Extreme heat days have tripled since the 1980s -- more are on the way. In an increasingly warmer world, the number of days per year that city dwellers everywhere are suffering through extreme heat has risen three-fold in the past four decades, a new report finds. Read more