The Dust of Death is a virus created by Red Skull which infects anyone in cloud form and turn them into horrifying versions of himself.
In an attempt to turn the United States government against the Avengers, the Red Skull unleashed the virus on the Avengers Mansion and the nearby population. He then ordered the United States military to attack the mansion and sent Code Red team to arrest them, but were taken out by the Avengers who managed to fight the virus before falling ill. Thor used his hammer to blow away the clouds causing the virus. Hawkeye found the container that contained the virus. Iron Man found a cure for the virus and cured everyone who got affected.