Jonathan Lambert

This Ebola outbreak is already the third largest on record, despite only being declared last Friday.

At a press conference on Wednesday, WHO officials said that given the scale, the outbreak likely started a couple months ago and was spreading undetected.

Here's WHO Director General Tedros Adhanom Ghebreyesus.

The kind of Ebola that's spreading is rare, and existing field tests often miss it.

There are also no approved treatments or vaccines.

WHO officials said that while there are a couple vaccine candidates that might be tested, they won't be ready for that testing for months.

Jonathan Lambert, NPR News.

Around the 1980s, obesity started ticking up in many parts of the world.

Back then, it was mostly a problem for wealthy countries.

But as time went on, it grew into a global phenomenon.

Now, a new analysis finds that obesity levels are plateauing in most wealthy countries and

A few, including France and Portugal, are even seeing declines.

But across many low- and middle-income countries, rates are accelerating.

Some of those countries, including many Pacific island nations, now have some of the highest obesity levels of any country.

The study can't say for sure why this is happening.

Increased availability of sugary drinks and processed foods could be a factor, the authors say.

and laxer food regulations may also be contributing.

Jonathan Lambert, NPR News.

The COVID-19 pandemic threw a major wrench in routine childhood vaccination programs for diseases like measles and polio.

In 2021, more than 25 million children missed at least one vaccination as clinics closed and resources were diverted to fighting the pandemic.