Ah! So sorry to hear about your thesis partner! I had covid visiting my home too, 3 members of my family got it, it was really hard to stay safe and healthy during that time, but because of some miracle I got by without getting ill or even if I did get it, it was so mild that I mostly didn't even notice. It was, however, very stressful as I was taking care of one of them. All the sanitation madness was a bit too much for me.

Good question, I would probably need some sort of permit to have such device, but I am not sure yet, have to research a bit more.

Hope to see you posting soon! :)