EASY BUT IM DUMB

11) Two people live in close proximity and come into contact with the same infected items, but only one comes down with symptoms of Lassa fever. What is the most likely explanation?

A) The uninfected person was vaccinated.

B) The infected person did not practice good self-care.

C) The infected person had a weakened immune system.

D) Both are infected, but only one is showing symptoms.