Science & technology | Well informed

RFK junior wants to ban an ingredient in vaccines. Is he right?

Studies show that thimerosal does more good than harm

Illustration of a person in a lab coat examining into the needle of an oversized syringe.
Photograph: Cristina Spanò
|3 min read

ON June 26th a vaccine advisory panel installed by Robert F. Kennedy junior, America’s health secretary, recommended that thimerosal (also spelled thiomersal), an ingredient used in some multi-dose vaccine vials, should be removed from all flu jabs.

Explore more

El Sauce Observatory , Chile under the night sky.

An interstellar object is cruising through the solar system

Its appearance puts a new branch of astronomy to the test

A plant using photosynthesis to create new proteins.

AI is helping to design proteins from scratch

They could treat diseases, test drugs and boost crop yields


A pen made of a DNA strand.

A new project aims to synthesise a human chromosome

The tools developed along the way could revolutionise medicine


How sea slugs give themselves superpowers

Their slimy shenanigans might have applications for humans, too

Is being bilingual good for your brain?

Perhaps. Learning languages offers other, more concrete benefits

Distrust in public-health institutions is not just an American problem

Across the rich world politics is driving scepticism