Jonathan Lambert

The group's been praised for their vaccine research by Health and Human Services Secretary Robert F. Kennedy Jr.,

But many scientists have questioned their research practices.

The study isn't designed to test whether the vaccine works.

Instead, it will look for potential side effects in babies born in Guinea-Bissau, a country that doesn't currently vaccinate at birth.

The researchers will vaccinate some newborns and withhold the newborn dose for others, then follow both groups for several years.

Some experts criticize the withholding of a well-studied, life-saving vaccine in a country where nearly one in five people are infected with Hep B. Jonathan Lambert, NPR News.

The question of what it would cost to end extreme poverty is a tricky one.

For one, it's difficult to accurately identify everyone who lives on less than $2.15 a day.

And it's tough to know the precise needs of each of those people.

Researchers at the Center for Effective Global Action at UC Berkeley offer an answer.

They used AI to analyze how much people spend on things like food or shelter in about a dozen of the poorest countries.

That allowed them to estimate that virtually ending extreme poverty would cost roughly $318 billion a year.

That's about 0.3% of global GDP, a sum that is a bit more than was spent on foreign aid until recently, but roughly seven times less than what we spend on alcoholic beverages.

Jonathan Lambert, NPR News.

This fall, the U.S.

Centers for Disease Control and Prevention revised its website to say that a link between vaccines and autism can't be ruled out.

That reversal in guidance has been taken further by President Trump, who has repeatedly suggested vaccines can cause autism.

Now, WHO is releasing its own review of the evidence.

Its medical experts analyzed more than 30 studies conducted over the past 15 years.

Here's WHO Director General Tedros Adhanom Ghebreyesus.