I think that the answer is:
A). medical care
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Proper pronunciation is important because improper pronunciation can result in mistakes that could affect someone's health.
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Answer:
Cytokine release syndrome is a form of systemic inflammatory response syndrome that can be triggered by a variety of factors such as infections and certain drugs.Critically important studies emerging from China suggest that for many patients who die of corona, it may be their own immune system, rather than the virus itself, that deals the fatal blow. This is called a cytokine storm. Untreated, cytokine storm syndrome is usually fatal.
Explanation:
The CRS syndrome could be partially why people in china were dying, due to weak immune systems
The answer to this one should be cancer
Some time word of mouth, bill boards, but most of the time the internet, by using redirecting pages and ads lol