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A new way to rejuvenate the immune system

As people age, their immune function weakens. Owing to shrinkage of the thymus, where T cells normally mature and diversify, populations of these immune cells become smaller and can’t react to pathogens as quickly. But researchers at MIT and the Broad Institute have now found a way to overcome that...

Measles cases are rising. Other vaccine-preventable infections could be next.

Measles cases are rising. Other vaccine-preventable infections could be next.

There’s a measles outbreak happening close to where I live. Since the start of this year, 34 cases have been confirmed in Enfield, a northern borough of London. Most of those affected are children under the age of 11. One in five have needed hospital treatment. It’s another worrying development for...

US deputy health secretary: Vaccine guidelines are still subject to change

US deputy health secretary: Vaccine guidelines are still subject to change

Over the past year, Jim O’Neill has become one of the most powerful people in public health. As the US deputy health secretary, he holds two roles at the top of the country’s federal health and science agencies. He oversees a department with a budget of over a trillion dollars. And he signed the...

The Download: inside the QuitGPT movement, and EVs in Africa

The Download: inside the QuitGPT movement, and EVs in Africa

This is today’s edition of The Download, our weekday newsletter that provides a daily dose of what’s going on in the world of technology. A “QuitGPT” campaign is urging people to cancel their ChatGPT subscriptions In September, Alfred Stephen, a freelance software developer in...

Meet the Vitalists: the hardcore longevity enthusiasts who believe death is “wrong”

Meet the Vitalists: the hardcore longevity enthusiasts who believe death is “wrong”

“Who here believes involuntary death is a good thing?”  Nathan Cheng has been delivering similar versions of this speech over the last couple of years, so I knew what was coming. He was about to try to convince the 80 or so people in the audience that death is bad. And that defeating it should...

The Download: A bid to treat blindness, and bridging the internet divide

The Download: A bid to treat blindness, and bridging the internet divide

This is today’s edition of The Download, our weekday newsletter that provides a daily dose of what’s going on in the world of technology. The first human test of a rejuvenation method will begin “shortly” Life Biosciences, a small Boston startup founded by Harvard professor and...

The Download: chatbots for health, and US fights over AI regulation

The Download: chatbots for health, and US fights over AI regulation

This is today’s edition of The Download, our weekday newsletter that provides a daily dose of what’s going on in the world of technology. “Dr. Google” had its issues. Can ChatGPT Health do better?   For the past two decades, there’s been a clear first step for anyone who...

Measles is surging in the US. Wastewater tracking could help.

This week marked a rather unpleasant anniversary: It’s a year since Texas reported a case of measles—the start of a significant outbreak that ended up spreading across multiple states. Since the start of January 2025, there have been over 2,500 confirmed cases of measles in the US. Three people...

The Download: cut through AI coding hype, and biotech trends to watch

The Download: cut through AI coding hype, and biotech trends to watch

This is today’s edition of The Download, our weekday newsletter that provides a daily dose of what’s going on in the world of technology. AI coding is now everywhere. But not everyone is convinced.   Depending who you ask, AI-powered coding is either giving software developers...

The Download: sodium-ion batteries and China’s bright tech future

The Download: sodium-ion batteries and China’s bright tech future

This is today’s edition of The Download, our weekday newsletter that provides a daily dose of what’s going on in the world of technology. Sodium-ion batteries are making their way into cars—and the grid For decades, lithium-ion batteries have powered our phones, laptops, and...