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

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

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.