Section 3(3)(iii) in The M.P. Civil Services (Extraordinary Pension) Rules, 1963
(iii)an epidemic disease contracted by an officer in consequence of the due performance of his duties connected with the epidemic in an area in which such disease is prevalent, or in consequence of his attending voluntarily, out of humanitarian motives, upon any patient suffering from any such disease in any area where he happens to be in the performance of his duties.