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• Shannen Doherty reveals cancer has spread to her brain

  Actress Shannen Doherty is letting her social media followers in on the spread of her breast cancer.

  

• Social media helps invent, then circulate info on DIY air purifiers amid wildfire smoke

  Social media users are sharing a surprisingly effective way to protect yourself indoors from the toxic wildfire smoke blanketing much of the East Coast: a box fan, four air filters and a whole lot of duct tape.

  

• 'Very, very hard to breathe': Experts call wildfires a 'major public health concern' for Canada

  As forest fires rage across the country, experts are sounding the alarm over the physical and psychological impacts of the wildfires and saying that they pose a serious public health issue, which individuals and governments need to acknowledge and act upon.

  

• How the lack of gravity in space impacts astronauts' brains

  What happens to the brain when you take gravity away? According to a new study looking at astronauts both before and after space travel, that experience causes physical changes that researchers believe requires at least three years between longer missions to recover from.

  

• Ontario hospitals told to 'be alert' for increasing trend of invasive Group A strep

  Ontario hospitals and pediatric physicians are being told to 'be alert' for symptoms of invasive Group A Streptococcal Disease (iGAS) after an “increasing trend” has been identified.

• Poor air quality forces cancellation of surgeries at Temiskaming Hospital

  The Temiskaming Hospital says poor air quality caused by forest fires has led to the cancellation of all surgeries and obstetrical procedures scheduled for Friday.

• Documents reveal what happened inside the discord at Canada's drug-price regulator

  Internal emails from the agency tasked with regulating the price of patented drugs in Canada shows discord and division was sparked by a letter from the health minister, culminating in an indefinite pause on major drug-price reforms and several resignations.

• Sleep, don't scroll: Tips to avoid sleep procrastination

  Being a 'sleep procrastinator' might not only make you grumpy the next day, it can put your health at risk. A sleep expert shares tips for making sure bedtime is shut-eye time.

• Wildfire battles continue as heat, air quality alerts affect most of Canada

  Air pollution from wildfires remained well above healthy levels across much of southern and northern Ontario and several communities in British Columbia and Alberta on Thursday.

• Honolulu police: 2 dead after suspected mass overdose of fentanyl

  Two people died in what officials believe was a mass fentanyl overdose over the weekend involving five people in a hotel room in the Hawaii tourist mecca of Waikiki.

• Can face masks help protect you from wildfire smoke? Health expert explains

  An official recommendation to wear a mask to protect yourself from wildfire smoke is being echoed by health experts as plumes of smoke make their way across parts of Canada, causing poor air quality.

• Bisexual women 3 times more likely to attempt suicide compared to straight women: Canadian study

  In the first study of its kind to tie survey data to health records, researchers found that bisexual women were three times more likely to attempt suicide compared to heterosexual women.