I don't think it's fair to call it "misinformation" since that implies an intention to spread false or unchecked information. To the best of their knowledge ,

I don't think it's fair to call it "misinformation" since that implies an intention to spread false or unchecked information. To the best of their knowledge , at the time, that was what the evidence pointed to. Then, as more evidence surfaced they realized that those assumptions didn't hold (and that could change again in the future with new research).