Health roundup: What it looks like when you drive high, a destructive HIV variant found, and more

Here’s what happened when people high on weed used a driving simulator

You smoked a joint an hour and a half ago. Now it’s worn off enough that you feel fine to get behind the wheel.

But you’re fooling yourself, a new study says. You’re likely about to drive under the influence of weed, endangering yourself and others.

Marijuana smokers who feel they’re sober enough to drive usually are still too impaired to operate a vehicle safely, researchers report.

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Young Americans lost almost 1.5 million years of life to opioids from 2015-2019

The U.S. drug epidemic continues its death march, with new research showing American teens and young adults have lost nearly 1.5 million years of life due to drug overdose deaths in recent years.

For the study, the researchers examined years of life lost — the difference between a person’s expected lifespan and when they actually die — among nearly 3,300 adolescents aged 10 to 19 and nearly 21,700 young people aged 10 to 24 who died from unintentional drug overdoses between 2015 and 2019.

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Humans’ sense of smell may be getting duller

Your sense of smell may not be as good as that of your ancestors.

A new study that tested volunteers’ perceptions of various smells — including underarm odor — adds to growing evidence that people’s sense of smell is declining, little by little.

“Genome-wide scans identified novel genetic variants associated with odor perception, providing support for the hypothesis,” the researchers said in a news release from the journal PLOS Genetics. The study was published there Feb. 3.

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More destructive variant of HIV spotted in the Netherlands

If the pandemic taught the world nothing else, it’s that viruses can mutate, potentially giving rise to new and more harmful variants.

Now, new research reveals that’s exactly what has happened with HIV, the virus that causes AIDS.

Called VB (for virulent subtype B), the “new” HIV variant actually seems to have emerged more than 30 years ago. But its existence was only recently confirmed by a team of genetic researchers from the United States, the United Kingdom, the Netherlands, France, Sweden, Germany, Switzerland and Finland.

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