It is possible for a measure to be valid but unreliable It is possible for a mea

Question

It is possible for a measure to be valid but unreliable


It is possible for a measure to be valid but unreliable



QUESTION 33 1. Host factors in the causation of disease include: a. temperature and humidity. b.chemicals in the air, water, or food C c. altitude d.genetic factors 2 points QUESTION 34 1. Wnic of h olowng esampes nvoles indiect tansmision of disease? a. A "malaria" and B" Hepatitis caused by needle sticks" b, HIV/AIDS C c. Pneumoconiosis C d. Hepatitis caused by needle sticks C e. Malaria

Explanation / Answer

(33)

Host factors in the causation of disease include genetic factors, because all the other factors included in the list are environmental factors which determine the extent of exposure of a human to causative agents, but when we talk about host factors, we focus on factors which are dependent on the individual's traits, which include the individual's genetic make-up.

(34)

In this case the indirect mode of transmission is the spread of hepatitis caused by needle sticks.

This is because this is an inanimate source of infection which temporarily serves as a carrier of the infectious virus, and is not the prime mode of transmission.

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