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The Economist
The Economist
17 Mar 2025


NextImg:Do viruses trigger Alzheimer’s?
Science & technology | Going viral

Do viruses trigger Alzheimer’s?

A growing group of scientists think so, and are asking whether antivirals could treat the disease

In the summer of 2024 several groups of scientists published a curious finding: people vaccinated against shingles were less likely to develop dementia than their unvaccinated peers. Two of the papers came from the lab of Pascal Geldsetzer at Stanford University. Analysing medical records from Britain and Australia, the researchers concluded that around a fifth of dementia diagnoses could be averted through the original shingles vaccine, which contains live varicella-zoster virus. Two other studies, one by GSK, a pharmaceutical company, and another by a group of academics in Britain, also reported that a newer “recombinant” vaccine, which is more effective at preventing shingles than the live version, appeared to confer even greater protection against dementia.

A scale with a big tooth in the middle. The weights are a prwan on one side and toothpaste on the other side.

What is the best way to keep your teeth healthy?

Tooth-brushing reigns supreme. But fluoride in tap water is a good safety net

A drone operator of 3rd Assault Brigade is seen working at positions near the frontline in the direction of Borova, rural settlement in Izium Raion, Kharkiv Oblast, Ukraine.

Ukraine’s embrace of drone warfare has paid off

Two new reports highlight strengths as well as weaknesses



Want even tinier chips? Use a particle accelerator

High-speed electrons can etch nano-scale designs

Is butter bad for you? 

A new study suggests olive oil may be a healthier alternative

Two private companies reach the Moon within four days

Though Firefly Aerospace has had better luck than Intuitive Machines