11. Disease Resistance to Cholera
In regions where cholera has been a persistent threat, certain populations have developed genetic adaptations that enhance their resistance to this deadly disease. Studies have identified specific gene variants that help limit the severity or likelihood of cholera infection.
These protective adaptations have likely spread rapidly in response to repeated outbreaks, illustrating how ongoing exposure to a pathogen can shape the genetic landscape of affected communities. Such examples underscore the continuous and dynamic nature of human evolution in the face of environmental pressures. NIH research