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1 vote
An example of an infectious disease is:

1-sickle cell anemia
2-small pox
3-Down syndrome
4-diabetes

User Umbreen
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2 Answers

5 votes
I think the answer is :
2-small pox
Because it is the only one that can infect others by contact
User Keyfer Mathewson
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1 vote
Small pox is the answer

Explanation: Down Syndrome is something your born with

Sickle Cell Anemia is inherited from your parents

Diabetes comes from your diet

Small Pox is the only one that is a virus that is similar to the flu

User Minda
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3.5k points