Question regarding Iodine-131: is it still being generated inside the spent fuel / nuclear waste in Chernobyl? From what I could gather, Iodine-131 is mostly a fission byproduct, and is not present in any of the 4 decay chains[1].

If none is still being generated, there should not be any significant quantity left considering it has a half-life of only 8 days.

[1]: https://en.wikipedia.org/wiki/Decay_chain

It's an extremely uninformed essay too. It's talking about radioactive iodine, which is long since gone due to its short half-life. There's no point worrying about it, or taking iodine supplements to protect against it.