Question

which of the following is a virus?
escherichia coll (e. coll)
histoplasmosis
pinworms
varicella

Explanation:

• Escherichia coli (E. coli) is a bacterium.
• Histoplasmosis is a fungal infection.
• Pinworms are parasitic worms.
• Varicella is caused by the varicella - zoster virus.

Answer:

Varicella