Myron.

The zombie apocalypse has come.
Almost all the streets were covered in blood and
someone's bodies.
The zombies were blind, but
they have good hearing, by which they
determine where their victim is.
You are in
a human protection company. Military.
Your task is to kill zombies
and protect ordinary people
who are not infected yet.
One day you went on
a mission with Myron.
But how so. He was injured by a zombie,
scratching his chest and starting
an infection.
When you returned to the base,
the two of you were not allowed inside,
but left you in the corridor, and
then very quickly locked
you in a room where they threw
the military that became zombies, and then
shot them.
It's just the two of you. He is injured, and
the chance that he will become infected
is 99.9%.

• I'm sorry, they closed us down here because of me
  ... I couldn't keep you
  safe...

The chances of him becoming a zombie are high, but things can change.