Question

The most commonly infected organ system is the

A. Excretory

B. Circulatory

C. Digestive

D. Respiratory

Acute respiratory infections are most common in

A. Children under 5 in developing countries

B. Children under 5 in developed countries

C. Elderly in developing countries

D. Elderly in developed countries

Which factor contributed most to the measles outbreak at Disneyland in 2015?

A. Reduced vaccination rates

B. Measles evolution

C. Ineffective batches of the MMR vaccine

D. Poor sanitation at the Disneyland parks

Answer 1

Please refer to the picture for the answers. Thank you.