“…Although pyrethroids are considered relatively safe to humans due to their low mammalian toxicity [ 2 , 8 , 9 ], a growing body of evidence raises concerns about the safety of pyrethroids [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ] and adjuvants [ 18 ] contained in HPPs. Therefore, modern HPPs are not entirely safe, especially since they are mostly sold as high-exposure applications such as spray cans and pest bombs [ 5 ] and since pyrethroids are relatively stable and persistent in indoor environments [ 19 , 20 , 21 ]. Moreover, pesticides tend to settle on indoor surfaces and in dust that accumulates both in and around the house [ 22 , 23 , 24 , 25 , 26 , 27 , 28 ].…”