<prompt> Active immunity is not acquired by:InfectionVaccinationImmunoglobulin transferSub - clinical infection  <response>: Ans. is c i.e., Immunoglobulin transfer Ref: Ananthanarayan, 9the, p. 82 - 83 and 8the, p. 86, 87 Immunoglobulin transfer gives passive immunity. Rest of the other options are examples of active immunity. 