I talked to my friend whose parents are rednecks but got fearmongered into getting it, and he said he's been getting knee pain too. He's on his feet 10 hours a day and never had knee issues before.

I realized it's unlikely I got sick from work. I most likely got it from an off-leash dog park/hiking trail where there were tons of people. I went on Saturday and I still have symptoms 4 days later, but it's wearing off slowly. This is going to be a huge problem if people are getting sick just going outside.