My sister has the Black Plague. What do we do?

Hello to thy good people of GirlsAskGuys. How fair thee? My greatly beloved sister, Agatha Beatrix Lytelfinger thy III of Cornwall, Dame of Sussex and betrothed to Sir Geoffrey, former squire and head knight, has catchen of thy wicked ol' plague! Hath we tried letting of the blood, she is worse! Need we try trepanning with the drilling of the skull? Be quicketh with thy answers!

My sister has the Black Plague. What do we do?
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