Zac Hall, 9to5Mac:

Apple Watch and iPhone have supported a feature called Medical ID that lets you collect critical health data in one place. Medical ID can include your contact information, date of birth, medical conditions, blood type, and more.

And:

iPhone and Apple Watch offer a separate feature called Emergency SOS. When you hold down the Side Button on an iPhone and Apple Watch for several seconds, the device can call local emergency services for you.

And:

What’s new in iOS 13.5 and watchOS 6.2.5 is a new capability that connects Medical ID and Emergency SOS together. Starting later this month, customers can opt into a new Emergency SOS feature that automatically shares Medical ID information with emergency services.

Nice evolution.