Question

which best explains an international occurrence of a virus originating from bats? a. it is an epidemic that is carried and transmitted by the air. b. it is an epidemic that is carried and transmitted by a vector. c. it is a pandemic that is carried and transmitted by a vector. d. it is a pandemic that is carried and transmitted by the air.

Explanation:

1. First, distinguish between epidemic and pandemic: An epidemic is a disease outbreak in a limited area, while a pandemic is international/widespread. The question mentions "international occurrence", so it's a pandemic, eliminating A and B.
2. Then, consider transmission: Bats are vectors (organisms that carry and transmit pathogens). Airborne transmission is different from vector - borne. So a virus from bats (vector - borne) with international occurrence is a pandemic transmitted by a vector, matching option C.

Answer:

C. It is a pandemic that is carried and transmitted by a vector.