Explain the concept of contact with an infectious case of TB and how it increases the risk of TB.

Explain about important factors of Mtb. that influences the TB epidemic.

Explain about important factors of the host that influences the TB epidemic.

age, sex, immunity, co-morbidity, Nutrition, substance abuse,

Explain about the various environment factors that influence the TB Epidemic

Climate, over-crowding, pollution, socio-economoic conditions, ventilation, cultural