Typhoid is a bacterial disease that is caused by Salmonella bacteria. This disease is transmitted through contaminated food and water sources, or through close contact with someone else with the disease.
Symptoms:
William mentions an individual that has typhoid and is not likely to recover. He thanks his wife for sending socks because the marshes that the soldiers wade through are destroying their socks.
This letter was written only nine days after Knight wrote to Mary about there being many sick people, but only one person was that in critical condition due to typhoid. This letter is written more frantically. Knight lists at least 38 people that are sick and there are more sick individuals every day. Typhoid has spread to multiple individuals and other infectious diseases such as mumps have spread through the camp. It is unknown how many individuals have the specific diseases since most of these diseases share symptoms.