Leprosy is a bacterial infection. These days, it can be treated with antibiotics, so the chance of someone dying from leprosy is very low.
Mycobacterium leprae and Mycobacterium lepromatosis
Leprosy
it is a bacterial infection which is a bacteria
This type of leprosy is also called the multibacillary (MB) leprosy, because of the presence of large numbers of bacteria.
Bacteria are not vectors that carry viral diseases.
In TT leprosy the bacteria are very few and almost impossible to find.
Mycobacterium leprae.
it is a bacteria
It can be viral or bacterial.
Poliomyelitis of as its commonly known "polio" is a virus
Your question is confusing. Leprosy is the condition or disease caused by two bacteria, Mycobacterium leprae or Mycobacterium lepromatosis. These two microorgansims are obviously microscopic. Size is of little issue.
viral