Cold-blooded: How chilly weather caused this woman’s blood to clump
Freezing conditions often encourage huddling together: people, penguins, blood?
![Purple rash](https://www.ausdoc.com.au/wp-content/uploads/2022/08/must-see-livedo-reticularis_nejm-1.jpg)
A 70-year-old woman caught more than just a cold in the wintery chill of Upstate New York.
She presented to doctors with dizziness and this extensive purple rash two weeks after the onset of a respiratory infection.