Humanity is facing an unprecedented threat. The world is plagued by invisible enemies, namely, the unholy trinity of SARS, MERS & COVID-19. The people of the world are uniting like never before to battle the evil forces of the Viruses.
You are the leader of the red & white blood cells in the body. You must command the blood cells well to defeat the viruses of SARS, MERS & COVID-19. Your life depends on it! You will be given some time to prepare before the Viruses invade the body. Once they start invading the body, destroy all Viruses to win.