This is because pharmaceutical companies want to make more money, so if they make a cure, less people will need to come to them.
If they only treat diabetes, more people will buy for them and they’ll need to make more supplies.
Hope this helps!! :)
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No only when they are trying to get a certain part of your body like your hand they will isolate it with something to block it in other words the xray can see through you cloths anyways you'll be fine