Harvard Health Content API

In the US, widespread vaccination halted the ongoing spread of measles more than 20 years ago, but recent outbreaks have flared in over 20 US states, leading to hospitalizations and at least two deaths. Measles is highly preventable — here’s what you need to know.

Sleep is a key pillar of health, and countless influencers on social media are touting a concept called sleepmaxxing. But what exactly is it? And how likely is it to deliver on claims of amped-up energy, a boost to the immune system, reducing stress levels, and improving your mood?