Allergy

Tsuranga medtags indicated, among other things, patients' allergies. (TV: The Tsuranga Conundrum)

Liz Shaw was allergic to cats and pineapple. (AUDIO: A Home From Home)

The Fifth Doctor was allergic to certain gases in the praxis range of the spectrum. As such, he wore a stick of celery in his lapel; if the gas was present, the celery would turn purple and the Doctor would eat it. (TV: The Caves of Androzani)

The Doctor likened the Cybermen's vulnerability to gold to an allergy. (TV: Earthshock)

John Harrison claimed that Joseph Serf suffered from an acute peanut allergy so as to avoid Sarah Jane Smith shaking his hand and thus exposing him as a hologram. (TV: The Man Who Never Was)

Bradley had an allergy to nuts. (TV: In the Forest of the Night)

Aboard the Drum, the Twelfth Doctor asked if anyone had a peanut allergy. (TV: Under the Lake)