There are numerous circumstances that give pathogens the chance to harm people.
The first occurs when an infection has already weakened the immune system. In situations like this, other pathogens may infect the host opportunistically and cause an infection. If the human host does not maintain proper personal and environmental hygiene, that is another condition. Many pathogens thrive in unclean environments, so by failing to maintain proper environmental hygiene, a person increases his risk of contracting a pathogen.
Finally, since so many pathogens are transferred by vectors, humans are more likely to contract the diseases that these vectors aid in spreading if they do not take the necessary precautions to stop their activity.
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<span>The answer is letter C.<span>
<span>The
operative word for the sentence is exercise. The effect of developing good endurance
is caused by exercise. Exercises that are performed on a regular basis give
individuals many beneficial effects to health and overall development.
Individuals should at least exercise 30 minutes a day, 3-5 times a week in able
to reap the benefits that it could bring to the body internally and externally.
But before any training regimen, individuals should consult a physician to
ensure that the activities to be performed will be safe. </span></span></span>
