Yes, the bacteria I work on is highly infectious and causes food poisoning. I have to be very careful to wash my hands when I leave work, I wouldn’t want to bring the bacteria home with me! I also work on genetically modified bacteria, and we definitely wouldnt want those escaping!
The work I do in the lab is pretty safe as long as you are careful. In general nuclear fusion, while safer than nuclear fission, does present some risks. In particular there will be some radioactive waste generated and this has to be safely stored for several hundred years, so it can’t harm people or end up in the hands of terrorists.
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