Read "Rats, Lice and History" by Hans Zinsser.
Iirc the variety of Typhus associated rat’s fleas historically kills relative,y small numbers of prople. Its cousin, spread by human body lice, is the real big fast killer. Unlike head or crab lice, which live on the hairs of humans, body lice actually live on the unwashed clothing of people. That the people inside unwashed clothing are often also unwashed is merely coincidental. CA hasn’t reached that tipping point — yet — but current policies are pushing them in that direction. Where the traditional fixes will be forced up9n them: round up all the problematic people into camps, burn all their clothing, dust them all down with DDT powder. Sufficiently terrified libs can and will employ the first two measures, even while being accused of liberal apostasy by those libs further removed from the reckoning. But the third will stymy them. Their favorite mass killer and their once favorite boogeyman, Rachel Carson and Trickey Dick Nixon, conspired to rid us of DDT. Trump needs to push lib BPs even higher and restart its production!