In what year was the typhoid vaccine created?

• A. 1894
• B. 1896
• C. 1902
• D. 1910

Answer: (B)

The main idea here is understanding when scientists first created a vaccine against typhoid, showing how vaccines started to emerge in the late 19th century after germ theory became established. The correct year is 1896, when Almroth Wright developed and tested the first typhoid vaccine using killed Salmonella typhi. This was a milestone because it demonstrated that the immune system could be trained to resist typhoid and that vaccination could protect people, especially in crowded settings like armies. Wright’s work built on the growing belief in immunization as a preventive tool and laid the groundwork for later, more widespread use of typhoid vaccines in military and civilian health. The other dates fall outside this early breakthrough: they come either before Wright’s development or after the initial vaccine, which is why they don’t denote the creation of the first typhoid vaccine.