151. Humans have acquired immune system that produces antibodies to neutralize pathogens. Still innate immunity is present at the time of birth because it. (1) Is very specific and uses different macrophages (2) Produces memory cells (3) Has natural killer cells which can destroy microbes (4) Provides passive immunity 152. Incubation period for AIDS is usually :- (1) 5-10 month (2) 5-10 years (3) 2-12 month (4) 2-12 weeks 153. A. Microsporum B. Trichophyton C. Epidermophyton Which of the above given fungi are responsible for ringworms? (1) A,C (3) B,C (2) A,B (4) A,B,C 154. Aedes agepti is not a common vector in which disease? (1) Zika fever (2) Malaria (3) Dengue (4) Chikungunya