For routine injections I just wear scrubs and sterile gloves. No mask or hat. I started that several years ago after seeing others who were not wearing masks or hats. At first I was blown away but I saw their track record and adopted their style. Discos & implants are still done with "full metal jacket".
Now that you mention it, there has been a huge change that I guess happened so slowly I didn't notice it. When I was first starting out as an intern in 1979 there were very strict rules about scrubs. If you left the OR in your scrubs you had to wear a lab coat. You had to remove and discard your hat, mask and shoe covers, and you put on new ones when you came back to the OR. If you showed up in scrubs they demanded that you change into fresh ones. Urologists used to wear masks to do cystos.
Now I see people walk in and out of the hospital in scrubs (many of them custom scrubs with their names embroidered, obviously worn from home), and the nurses have cute little cloth hats with colorful designs that they seem to wear every day without washing in between. I see OR staff eating in the cafeteria with their hats on, shoe covers on, masks dangling around their necks. One place I worked the cataract patients were taken back to the OR in their street clothes.
Obviously the office environment is nowhere near as sterile as the OR, yet more and more procedures are being done by most specialties in the office, evidently without causing epidemics of staph infections.
Things seem to have lightened up considerably.