syphilis

A sexually transmitted infection caused by the bacterium Treponema pallidum, which can have various stages and serious health effects if left untreated.

scurvy

A nutritional deficiency disease caused by a lack of vitamin C, leading to symptoms such as fatigue, bleeding gums, and joint pain.

Stroke

A medical condition that occurs when the blood supply to the brain is disrupted, leading to brain damage and various neurological symptoms.