That wouldn't make sense considering there's a CLEAR picture of Richtofen on the wall by itself and it's larger than all the others. I honestly think Richotfen is going to die and turn into a zombie and Maxis is going to end up still being alive and take his place. Think about it; Tank, Nikolai, and Takeo are impervious to the effects of 115; this has been PROVEN. What about Richotfen? He's not impervious to it's effects, maybe it's finall starting to chnage him, for if you've ever looked at Richtofen; he's beginning to look more and more like a zombie with each new zombie map.
Maybe in call of the dead the reason why Takeo is being sick is because of too much exsposure to 115 and he is turning into a zombie