Didn’t read the thread beyond the few previous posts…
As for bedbugs, even clean normal families can find themselves infested with them. It’s harder if the family cannot afford encasing furniture, mattresses, as well as professional heat cleaning and extermination services.
That said, fyi, if G-d forbid anyone needs to get rid of bedbugs in comforters, mattresses, and sheets, you can do so by sealing them up 100% in plastic bags and letting them sit out in the hot sun for a week or two. The heat will kill them.
This is a good low cost method for someone who lives in a hot dry place and has time to spare.
This also works for dust mites.