The following story needs a citation from a primary source.  I read
this some years ago and have lost the source:

In the early part of the second century a plague broke out in the Asia
Minor city of Antioch.  A Roman solider dispatched a rescript to his
superiors in Rome giving his report of the outbreak wherein his writes
that in light of the fact that the disease was spreading, the
politicians, medical doctors and even family members had fled the
city, and that he too found it necessary to pull his troops back to
the periphery of the city to avoid contagion.
	This solider then adds a curious detail:  only one group remained in
Antioch to tend to and bring comfort to the dying.  It was, he
reports, a sect of disciples of a man executed by his fellow Roman
Pontius Pilate several decades previous. The solider found it
incomprehensible that people would risk their very lives to bring
comfort to the vulnerable and dying. These were early members of the
sect of Christians.

Galen, personal physician to Marcus Aurelius, wrote of his
observations that many Christians seemed to inexplicably survive the
plague (often called "Galen's plague", because of his recorded
accounts). Let me know if this helps produce an answer for you.

READINGGROUPSGUIDES.COM
http://www.readinggroupguides.com/guides3/beyond_belief3.asp

tutuzdad-ga

Dionysius also apprently wrote a similar account:

"Dionysius? Easter Letter from around 260 AD (p82) indicates that
while many Christians, especially the leaders, died other Christians
having survived, were immune and were able to nurse many over the
course of the plague.

Later, the Roman Emperor Julian, who hated these ?Galileans?, sought
to get the pagans to imitate their care, but without success. Plagues
reinforced faith rather than government edicts. Christianity embraced
an new idea foreign to all religions; God expects his followers not
only to worship him, but to care for each other. ?Loving one another?
beyond family ties as a religious requirement was a revolutionary
idea"

The Rise of Christianity 
http://64.233.187.104/search?q=cache:d6LhNxNjTCEJ:www.fgbc.org/welcome/info-fgbc/2004-05-26Teevan.htm+plague+antioch+%22christians+*+survived%22&hl=en