I still haven't had it yet, but everyone around me has multiple times. So, my current working theory is I am a fully asymptomatic one-man superspreader.
Even when my wife & son were both in the ER with it, my daughter and I tested negative. I had pneumonia once and then bronchitis a couple times, still tested negative. I'm convinced I have a weird immune system and just won't ever test positive even if I have it.
Now that you mention pneumonia, I've had this lingering cough since the flu back in February. WTF! Sure it's almost June and I only cough rarely, maybe one a day at most, but for fucks sake, WTF is that?