Plot Issue. (Spoilers)

The plot point I am referring to is Gianni (the bad guy) has been commissioned by a Colombian drug cartel to eliminate their enemies, in this case being the National Drug Control agency. To do this, his plan is to use a deadly virus that is spread by breathing on someone, infecting the head of the National Drug Control agency, and let the virus kill them all and therefore stop what ever policies that would have caused a problem for the drug cartel.

My issue is this: Did Gianni think that the virus would only kill the people in the agency and then miraculously stop spreading? I would think that this idea was not well thought out. If the virus spreads by just breathing on someone then every single person those people came in contact with would be infected. Secretaries, associates, reporters, guards, people they pass in the hallway, family members, etc. This virus could have easily wiped out a very large part of the population and since Gianni had the only cure it might have devastated most of the planets population.

"Kiss my Converse!" -Sho'nuff: The Shogun of Harlem.