Wolverine/Punisher: Revelation (1999) #2

Continuing the team-up between the toughest men in comics! A mystery illness has struck down New York's entire Upper West Side -- and the rest of the city is next! Among the fallen lay Frank Castle's dear friend -- and she'll die unless an antidote is found! Now the Punisher and Wolverine must descend into a series of long forgotten underground tunnels to unravel the mystery of the mutant called Revelation. That is, if they can keep from killing each other!