My husband’s PMR started after contracting flu last February. We just figured he was slow to recover until severe side/back pain. We went to ER, they did scan and recommend he go for colonoscopy. Three days later he suddenly went blind. GCA diagnosed by opthalmologist and confirmed by biopsy. Too late to save vision. Hospitalized for a week on high dose of prednisone. Face and stomach now bloated. Now down to 12 mg prefer and on methotrexate but pain recurrence. I’m believe the flu triggered all this. My husband is very discouraged and says he hopes he goes to bed and doesn’t wake up. Tough times. Hope it gets better for you.

Yep, there ya go!
Watch out for post Covid infection too.
Doctors will say it's possible, then some will say no.