Complex sentence: Typhoid fever, also known simply as typhoid, is a bacterial infection due to "Salmonella typhi" that causes symptoms which may vary from mild to severe and usually begin six to thirty days after exposure.
Split into simpler sentences: Typhoid fever, also known simply as typhoid, is a bacterial infection due to "Salmonella typhi" that causes symptoms. Symptoms may vary from mild to severe and usually begin six to thirty days after exposure.