It’s a typo, and yet it all seems so right.
Folks who believed in false clams (such as the idea that spraying chlorine on yourself could protect you from getting sick if you’ve already been infected) were more likely to actually get COVID–19. [“The Boiling Pot: secret codes of “Jeopardy!”; B.S. about Betty White; the Post touts alt-med; Canadians and their astrology,” Paul Fidalgo, The Morning Heresy]
Maybe they’re just octopuses in camouflage? Given all the other shit fishes spray about, chlorine just seems quite likely.