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Tuberculosis (TB) is an infectious disease caused by Mycobacterium tuberculosis. There were 14.4 million individuals worldwide living with TB including half a million cases of Multidrug-resistant (MDR) TB in 2006. A most serious aspect of the problem has been the emergence of MDR-TB and...

The aim of immunization programme for children is to control infection in the community apart from individual protection. A lower level of herd immunity than what is necessary for solid individual protection can effectively control the incidence of communicable diseases if a high proportion of...