The Vaccine (The Outer Limits) - Plot

Plot

A genetically engineered virus, developed and released by a doomsday cult, has wiped out almost all human life on Earth. Twelve hospital patients, accompanied by the one remaining staff member, nurse Marie Alexander, are living on borrowed time in the hospital, with food and fuel for the generator running dangerously low.

A soldier arrives with a newly developed vaccine, but Marie is horrified to learn that there is only enough for three people. Along with this, the vaccine requires three days to fully develop before it can be injected into any humans.

Marie only reveals to the group that there is a vaccine, not the amount, a fact she only reveals to her closest companion in the group, terminally ill cancer patient Bernard Katz.

When two members of the group discover the truth, they arm themselves with the only gun and force Marie to administer the vaccine to them, which she agrees to only if the third recipient is the child Harry. While she is preparing the vaccine, she turns her back only to see the third dose of vaccine being administered to one of the others, dooming young Harry to the virus.

Immediately, the three die of anaphylactic shock, leading Marie to conclude that the group survived not due to the hospital's sterile atmosphere but because they were immune, and after three months of confinement the group emerges from the hospital to face the new world...