Whatever uranium Iran has enriched is nearly all at the industrial level of 4.5 to 5%. Only a very small quantity has reached the 20% level needed for a planned medical reactor. What you should worry about is Iran's interest in polonium 210 which has the potential to be a nuclear "trigger" in the chain reaction series that results in a nuclear explosion.
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U.S., allies conduct 22 strikes against ISIS targets in Iraq, Syria (Reuters)
from the article: Before the bomb