The sci fi element of the animation plays a large part as it's what draws the target audience in.
The Sci-fi spaceships must be a combination of the medical facts (Spaceship + White Blood Cell) with the real world dogfight moves. Of course, the look of the ships must be sci-fi.
X-Wing - Star Wars
Tie Fighters - Star Wars
The spaceships in the animation will be a meld of the medical look and the spaceship look, as shown above. There are three different ships to design, a White Blood Cell one, a Virus one and a Virus Mothership. The basic look of the White Blood Cell and the virus/bacteria will influence the final design.