The Artificer class's infusions is one of it's main features, and it says this about creating infusions:
You must touch each of the objects, and each of your infusions can be in only one object at a time
So, I can only infuse one item with one learned infusion. However, nowhere does it explicitly say that I can't learn the same infusion twice. So the question is, by this reading, can I learn the same infusion twice, and use it on two different objects by doing so?