Golf is the answer to this question
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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Answer:
They are safe and unsafe at the same time
The person who gets the drug at the pharmacy is controlled but the person who has it can give it to anyone. This is a problem because prescription drugs are safe for that one specific person but if anyone else takes it can be deadly for them.
The scientific name for table salt is sodium chloride.