How did Alexander falconbridge attribute poor weather to an increase in disease?

Alexander Falconbridge noted that poor weather conditions, such as excessive rain and humidity, contributed to the spread of disease among enslaved Africans during the Middle Passage. He observed that these adverse weather conditions weakened the health of individuals, leading to an increase in illnesses such as dysentery and fevers. Additionally, the unsanitary conditions on slave ships were exacerbated by poor weather, creating a breeding ground for infections and illness, further diminishing the captives' overall health.