Smallpox has been eradicated, but not malaria or cholera. ...

Smallpox has been eradicated, but not malaria or cholera.

Which statements correctly explain this?

1 Cholera pathogens in the intestines are not destroyed by antibiotics.
2 Plasmodium antigens change during the life cycle.
3 Smallpox antigens remain stable.
4 Vaccines only work against viruses.

A. 1, 2 and 3

B. 1, 2 and 4

C. 1, 3 and 4

D. 2, 3 and 4

Select your answer:

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Other quiz:

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Both males and females have the a urinary system with the same organs. True or False?

A. TRUE

B. FALSE

The Skeletal System › View

Why is it important to keep bones protected?

A. Bones can break.

B. Bones are alive.

C. Bones create blood cells.

D. Bones are thick and strong.