I'd ask at the place where you're studying, I imagine the rule that everything below the elbow must be exposed is different if you're not a nurse/doctor but as someone else here has said, you might be allowed to wear a shirt underneath your scrubs or the disposable sleeve things they were talking about. But yeah, go check with where you plan on studying, they'll be able to tell you more
Some allow for really tight fitting sleeves to worn whereas others, as mentioned have disposable sleeves. I know from a Muslim friend of mine who worked as a HCA somewhere that because there were a lot of female Muslims working where she was, a special uniform was designed to accommodate their requirements while still being as trying to be of minimal risk to spreading infections from bed-to-bed.
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