One morning in late October, David Henke woke up and his hands weren’t working the way they should be.

“I couldn't hold a spoon correctly, was unable to button a shirt, unable to turn a key in a lock, kind of all of these smaller movements with your hands that you really take for granted. I suddenly wasn't able to do it, it was literally an overnight thing,” he said.

For the past few weeks, his family had been dealing with a wave of RSV, a common respiratory illness. His six-month-old daughter, Norah, caught the virus at daycare, and then passed it on to him and his wife, Leah. While the RSV was worrying, Norah recovered with a relatively mild case. And David and Leah were on the mend too.

That is, except for a tingling that David felt in his hands and feet. At first he disregarded it, but then his hands weren’t working. And the feeling was starting to creep into other parts of his body.