The health nannies have exhausted their credibility.

As long as the health nannies hold the power of government, they don’t really need credibility. Note the long history of legal prohibitions based on nothing more than superstition with a dollop of wishful thinking thrown in for justification.

The earliest surviving written Greek laws, the Locrian Code of 7th century BCE, specify sumptuary prohibitions (who can wear various articles and colors of clothing, who can associate with whom, etc.), and a prohibition on drinking undiluted wine.

For a historical survey of such laws and their consequences, see Thomas Szasz, Ceremonial Chemistry: The Ritual Persecution of Drugs, Addicts, and Pushers. Syracuse, New York: Syracuse University Press. 2003 [1974]. ISBN 978-0-8156-0768-7.

Widespread public panics and hysteria provide fertile ground for such laws and regulations in democracies.

Insofar as free speech is legal (and sometimes when it isn’t, recall Samizdat in the Soviet Union), ridicule and satire are sometimes useful weapons against them.

In that vein, I note one early 20th century satire, published during a public panic to sanitize everything that infants might possibly contact.

Strictly Germ-proof (1906)
Arthur Guiterman (1871 -1943)

The Antiseptic Baby and the Prophylactic Pup
Were playing in the garden when the Bunny gamboled up;
They looked upon the Creature with a loathing undisguised;
It wasn’t Disinfected and it wasn’t Sterilized.

They said it was a Microbe and a Hotbed of Disease;
They steamed it in a vapor of a thousand-odd degrees;
They froze it in a freezer that was cold as Banished Hope
And washed it in permanganate with carbolated soap.

In sulphurated hydrogen they steeped its wiggly ears;
They trimmed its frisky whiskers with a pair of hard-boiled shears;
They donned their rubber mittens and they took it by the hand
And elected it a member of the Fumigated Band.

There’s not a Micrococcus in the garden where they play;
They bathe in pure iodoform a dozen times a day;
And each imbibes his rations from a Hygienic Cup—
The Bunny and the Baby and the Prophylactic Pup.