However, one limitation of disease and infections is that they are frequently treatable compared to other hardships. Soldiers suffering from illnesses such as trench fever or dysentery may be transported to field hospitals for treatment, as opposed to those injured or killed by shellfire or sniper attacks. Furthermore, measures such as improved drainage, lice control, and hygiene served to mitigate the diseases’ impact over time. An estimated 380,000 to 520,000 British soldiers suffered from trench fever, leaving many incapacitated.