"The Deep Zone" by James M. Tabor

This is an action-adventure novel about a new disease that is resistant to all anti-biotics (man made?)...first effecting soldiers in the Middle East it spreads like wildfire with a 90% fatality rate within days of exposure!

The only know "cure" lies at the bottom of a miles deep cave system in Mexico....the race begins! If you've been fascinated with caving or the idea, the majority of the novel takes place underground.  Personally..NO WAY!

The author also wrote the novel "Blind Decent".  I recommend this to readers of the genre.