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Symptomatology and transmission
The clinical manifestations of acute HBV infection are age dependent. Infants, young children (younger than 10 years of age), and immunosuppressed adults with newly acquired HBV infection are usually asymptomatic. [2] Older children and adults are symptomatic in 30%–50% of infections
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I think Mackenzie is not the relative because of the blood type difference and the one who PROBABLY STOLE THE MONEY
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I don't know the other answer sorry and good luck
Answer: The correct answer is: They compete with already present animals for sources of food.
Hope this helps! :)
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