Question

How might the conditions on the ship have been conected to the diseases that were so common among slaves

Answer 1

The ships were built well but they cramp packed the slaves in the hull of the ship so if one person was sick the rest did too

Answer 2

Diseases were very common in boats, they were transmitted easily because of the poor hygiene and the way slaves were packed together.  Death could very important, as in a Portuguese ship, a hundred out of five hundred slaves died during the night because of an unrecorded disease.