Smallpox

 is a Tier 5 Tank that upgrades from Virus and S-Contagion at level 60.

Design
The looks very similar to S-Contagion but its small bullet barrel is lengthened, now resembling that of the Virus rather than the Contagion's.

Technical
The operates pretty much identically to the Virus, but it can zoom.

Trivia

 * The may be named as such due to its name starting with S, with it being an S-Virus.