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3 votes
Tsetse flies are notorious as carriers of the disease nagana in cattle and _____.

a. when they cause sleeping sickness in humans
b. of sleeping sickness in humans

User Mrzli
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2 Answers

7 votes
They are also carriers of sleeping sickness in humans.
User Marczellm
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2 votes
A. When they cause sleeping sickness in humans.
User Akom
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