Which arm do you get shots in?

I also get blood work drawn from my non dominant arm.

I answered dominant but it’s not really my choice. I had breast cancer and had lymph nodes removed on my left side so I can no longer use that arm for shots, blood pressure or blood draws. So I have to use my right which is my dominant side.

I am exactly the same. Right side for everything where possible, due to breast cancer on the left side. 
With my recent brain tumour surgery, I think I had a line in my left hand - I didn't see it, but my hand was badly bruised on day 2 after surgery - but I had something like 5 lines in, so they probably ran out of veins on the right!

I had sentinel nodes removed from my right armpit so all bloods/shots/blood pressure (OUCH have to be on the left.

As to which is my dominant side, that's more difficult to answer. I write with my right hand but can only throw/catch balls with my left, and the list goes on. I'd say I'm ambidextrous, but it's not that I can do everything with both hands, more that it depends on what the thing is that I'm doing. I'm dextrous-confused.

Normally left arm for shots BUT in the Autumn/winter months GP's have days put aside for just Flu shots plus Covid shots together so Flu shot in one arm & covid in the other .

And as for blood draws whatever arm the nurse can find a decent vein that day lol

Used to do non dominant but after some issues with a shot the dr suggested I use the other for a bit then when my non dominant is healed maybe alter.

Same. Always in my right (dominant) arm because of missing lymph nodes on the left.

I get shots in my non-dominant side ... weird because I sleep on that side ... never had a problem with pain!

For blood draws, whichever arm they can find a vein. I drink tons of water and wear a jacket, but it's still a crapshoot if they'll find a vein. They even go into my hand sometimes. I'm always relieved when I see this one tech because he gets it right every time.

I am left handed and tend to get it in my right, but like katlady it is because I sleep on my left side with my left arm under my head/pillow - so if my arm is sore it is bothersome and hard to sleep.  

Last time I got my Covid and flu at the same time and they would not do them in the same arm because if there was a reaction they wanted to know which one was causing it.

Blood draws are wherever they can.  I have weird veins and even after drinking a lot of water my blood draws can be problematic. 

I've had a mastectomy of my right breast so I automatically get everything done on the left. I have to for blood draws and BP so I'm just used to the left. I'm right handed and even if I didn't have to use the left arm, I probably still would.

I'm right-handed and get my shots in my right arm because I sleep on my left side. I can deal with a sore arm while I'm awake, but don't want to try to ignore it while I'm trying to sleep.

I would put down other cause it just depends on the day I guess.  I guess it is usually my non dominate arm, but for whatever reason it could land on my other arm.  I guess I don't care.. I weigh the options at the time and go with it.

Im pretty ambidextrous, but there is more favour to my right arm. I am also a rather strict left side sleeper. I get shots in my right arm.

As for blood draws, I only have one spot that is willing to readily give up blood. It's in my left elbow crook and I am very protective of it.