But the claim was specifically that it could cause that amount of deaths "if unchecked" and no preventative measures were put in place. But preventative measures were put in place? The claim isn't proven false by the current situation since the conditions that the claim was talking about didn't occur.
If I made the claim "If I don't eat today, I will get hungry", ate food and therefore didn't get hungry, I wouldn't say my initial claim was invalid.