Read the sentences from paragraph 3.

Dust storms stir up bacteria, molds, and fungi, which can cause “valley fever,” an infection that often follows dust storms in Phoenix. Virologists believe valley fever is caused by a soil fungus.

Think about the suffix -logist. What is the meaning of virologists above?

biologists who study fungi

doctors who try to find cures for diseases

scientists who study tiny particles that cause diseases

people who become sick after breathing in too much dust