Social & Preventive Medicine Communicable diseases 982a3113 Leprosy is not yet eradicated because - A No effective vaccine B Highly Infectious but low pathogenicity C Only humans are reservoir D Long incubation period High-Yield Explanation <p> Long incubation period (single best answer) Reference:Park&;s textbook of preventive and social medicine,K.Park,22nd edition,page no:291. <\p>