5 UTIs since I got Long Covid February 2021. Never had them before. I take D-Mannose and cranberry supplements off and on as possible preventatives, but am not sure they have helped. Right now trying a supplement of D-Mannose, cranberry, and hibiscus. I drink plenty of water. One thing I’ve read is that after menopause the tissue surrounding urethral opening dries out which makes it easier for bacteria to enter urethra and up to bladder, so I use vaginal estrogen for this. Also use lactobacillus vaginal suppositories and boric acid vaginal suppositories to keep that urethral opening acidic and with healthy bacteria. No longer wear underpants if wearing dresses or skirts ! Bactrim is my antibiotic of choice for treatment.