Answer :

Answer:

Protozoan and helminthic  disease are difficult to treat because their cells are structurally similar and function same  to human cells.

Explanation:

Protozoan and helminthic  disease are difficult to treat because their cells are structurally similar and function same  to human cells.

There are a host of pathogenic microorganisms. These are microscopic and virus-causing organisms. For example, bacteria, such as chlamydia and Lyme disease, cause illness. Several diseases, such as human papillomavirus and common flu, are also correlated with viruses.

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