Virus

Virus may refer to:
 * The Maverick Virus, a virus that infects Mavericks in Mega Man X.
 * Later named the Sigma Virus in Mega Man X3 after Sigma, the new leader of the Mavericks.
 * The Colony Virus from the Eurasia colony.
 * The Zero Virus in Mega Man X5, formed by merging the Sigma and Colony viri.
 * The Nightmare Virus in Mega Man X6.
 * The Virus status effect in Mega Man X: Command Mission.
 * Viruses in Mega Man Battle Network.
 * EM Viruses in Mega Man Star Force.