<prompt> The following statements about meningococcal meningitis are true except -The source of in fection is mainly clinical casesThe disease is more common in dry and cold month of the yearChemoprophylaxis of close contacts of cases is recommendedThe vacciens is not effective in children below 2 year of age  <response>: The meningococcal organism is found in the nasopharynx of cases and carriers. Clinical cases present only a negligible source of infection. Reference : Park;s Textbook of preventive and social medicine, 24th edition.Pg no. 175 