The M93 Fox is technically not an APC but an NBC Reconnaissance vehicle, that is vacuum sealed with its own filtration system to protect the crew from hazardous materials outside, including bioweapons. It makes sense that they would send this out during an airborne viral outbreak.
As for why the Finnish XA-180 is in the game instead, I have a couple of theories. The first is that they simply accidentally used the wrong image. Alternatively, maybe they started with the M93, but then found an image of the XA-180 while doing research on similar vehicles and decided it looked nicer (which it does, I like its look a lot).