Increased susceptibility to disease due to V. cholerae, Shigella, E. coli O157, and norovirus is seen in which blood groups?: (A) AB, (B) A, (C) B, (D) O
Answer is D. People with blood group O has increased susceptibility to to V. cholerae, Shigella, E. coli O157, and norovirus. Reference: Harrisons Principles of Internal Medicine, 18th Edition, Page 1085