I don't see any stats in the article about the "serge", and the source linked by the article only offers a weeks snapshot and last week's #.
ER diagnosis are at 2.1%, up from 1.9% the week before. Not sure that counts as a serge, especially since for all I know that's within the margin of error.
Anybody have better stats?
In that description, the two lines wouldn't necessarily be perpendicular.
Edit: I mean that if you're trying to apply the same mechanism to the second line, you wouldn't necessarily end up with the lines intersecting at 90°. But maybe I'm misunderstanding.