A Riddle For You

I entice everyone, day by day, Little by little, I expand, To your rooms, your closets, your hearts, Your soul, mind and body are not immuned, From such a dreadful wretch as I. Every day I am worse than the day before, Gloom, doom, kill, cure, save and exterminate, Need I say anymore? Of course, for you strive on what I produce. What am I? Our books, TVs, radios, CDs, and computers, Have knowledge of my uncanty wrath, Like a volcanico on the move, I have irrupted with smoke and moving lava, Here, there, and in every country I shall progress, To conquer man and beast alike, For there remains no place in which to hide, Should someone decide to stop me in my tracks, "No!" would come the vote, and I'd win by a landslide. What am I?