Chernobyl (the event) had a big impact on me.
At the time of the accident I was on a working holiday in Scotland. Just at the time when maximum fallout was wafting over the British Isles I was climbing Ben Lomond and other Scottish hills and soaking up the radioactive rain. Then I had a motorcycling accident on the way back from the Highlands and had to be hospitalised in Dumfries, during which time I had several powerful x-rays and scans, and drank plentifully of the local irradiated milk, which no-one really knew at the time was irradiated.
Later the same year I was hospitalised again for several weeks, this time in an ICU, and had more x-rays and scans during that stay than most people have in a lifetime.
As for the series, my brother is a graduate in Russian who spent a lot of time in the country in the 80's and beyond, and his testimony, added to what I know myself of the Soviet era, tells me the programme-makers have tried hard to create a period-look and done it fairly successfully.
Whether Chernobyl (the event) is responsible for the primary immune deficiency and other autoimmune illness I suffer from (and that nobody else in my family does) I don't know. But you have to wonder.