Do you capitalize the word scurvy in a sentence?

No, you don't capitalize "scurvy" in a sentence unless it's the first word of the sentence or part of a proper noun.

For example:

* Scurvy is a disease caused by vitamin C deficiency.

* He was diagnosed with scurvy after spending months at sea.

* The ship's doctor struggled to treat the outbreak of scurvy.

However, you would capitalize "Scurvy" if it's the first word of a sentence:

* Scurvy was a major problem for sailors in the past.

You would also capitalize "Scurvy" if it's part of a proper noun, like the name of a ship:

* The HMS Scurvy was a notorious pirate ship.