????

That’s a bit of a reach. The infected don’t look “black”, they look grayish blue.

Yeahh I wouldn't say they're black. It does sound like it took the name from ebola but the way they look is either regular skin tone or slightly grayish which is similar to many other comics in the zombie genre

I'm really talking about the first appearances, since I didn't read far ahead- the latest chapters seemed to have evolved but... in the beginning... hm

the colour of the skin is determined by the fact that they are not humans anymore, so the skin tone chaanged, normally, the bodies started to rot, so it will obviously have a darker tone. i think your consideration is a bit of a stretch