According to the natural history of disease model, the time before the precursors of disease and the host interact is called the period of: a. prepathogenesisb. pathogenesisc. primogenesisd. b and c

A) Prepathogenesis.

Explanation:

Prepathogenesis is the period preliminary to onset of disease.

For a disease to occur 3 factors are required.

1) Agent

2) Host

3)Environment

In absence of any of them disease cannot occur.

During prepathogenesis phase , man is not involved but he is exposed to risk of disease. During this phase the three factors (Agent , host ,environment) are present but in isolation forms. When these start interacting with each other man moves into pathogenesis phase.

Hence the answer to above question is A) Prepathogenesis.

all the above is what i would say