<prompt> Every TB sputum positive patient can infect up to1-2 persons per year5-6 persons per year10-15 persons per year100-200 persons per year  <response>: - Every TB sputum positive patient can infect up to 10-15 persons per year EPIDEMIOLOGY OF T.B: Country with highest TB burden India ARI 1.5 Infected with T.B 40 Developing T.B per day 5000day SS ve per year 0.8 million Deaths per year 0.37 million Index of infection 1-2 Prevalence of infection 40 Incidence prevalence of disease Sputum smear examination 