Victorian cold and flu remedies.

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Unfortunately, there's a virus going around and I seem to have caught it!  I definitely have a sore throat and sinus congestion, and my modern cold medicine doesn't seem to be helping much.  Victorian household manuals are full of tips for "Invalid Cookery" and remedies, and while some sound horrible and even downright dangerous, this one sounds like it might actually work. Plus, it doesn't use any poisonous ingredients!

355. SORE THROAT.—I have been subject to sore throat, and have invariably found the following preparation (simple and cheap) highly efficacious when used in the early stage; Pour a pint of boiling water upon twenty-five or thirty leaves of common sage; let the infusion stand for half an hour.  Add vinegar sufficient to make it moderately acid, and honey according to the taste.  This combination of the astringent and the emolient principle seldom fails to produce the desired effect.  The infusion must be used as a gargle several times a-day.  It has this advantage over many gargles—it is pleasant to the taste, and may be swallowed occasionally, not only without danger, but with advantage.
-- from Inquire Within for Anything You Want To Know, 1858.