<prompt> In HIV window period indicates:Time period between infection and onset of first symptomsTime period between infection and detection of antibodies against HIVTime period between infection and minimum multiplication of the organismTime period between infection and maximum multiplication of the organism  <response>: Ans. is b i.e., Time period between infection and detection of antibodies against HIVRef: Ananthanarayan, 9the, p. 579 and 8the, p. 578 It takes 2 - 8 weeks to months for antibodies to appear after infection. This period, from infection to appearance of antibodies is called as window period. During this period patients is seronegative, i.e., serological tests ELISA and Western blot are negative. The individual may be highly infectious during this period. 