A disease against which vaccination is restored only during epidemics is
Cholera is an infection of the small intestine caused by the bacterium Vibrio cholerae. The symptom includes large amounts of watery diarrhoea that lasts for a few days, vomiting and muscle cramps may also occur. Diarrhoea can be so severe that it leads to severe dehydration and electrolyte imbalance. The vaccine against cholera lasts for only 6 months, so vaccination is restored only during epidemics (rapid spread of infectious disease within a short period of time). So, the correct answer is 'Cholera'.