This disease was the main cause of death on the Oregon Trail. It took one third of the people who died on the trail and could kill in less than a day. To cure a person diagnosed with cholera, pioneers gave laudanum and immediate rest. If your supplies do not include laudanum, increase the persons amount of fluid and salt.
Malaria is caused by mosquito bites.
If someone gets malaria, pioneers gave quinine. Give the quinine right away or he or she will develop chronic malaria. Rest may also help.