A precursor to vaccination was used in Asia and inspired researchers , but the smallpox vaccine itself was invented by Edward Jenner in England . Though as is often the case with scientific endeavors , many people were working on the same project at the time . <| sep |> People couldn ' t handle the bantz <| sep |> As I explained in another post , I am explaining how to fight Card Advantage , I use Cow in some of my decks , as a defense to my opponent trying to gain card advantage on me . When my opponents start dropping spies , I start planning for the future and need to make neutral plays . To be clear , I play ST , so I can force my opponent to go first if not in a mirror , this makes the cow something that is essentially my first turn play if it turns into a 9 . If they stop using decoys and kill the cow , I can pass as they just used on of their cards to give me 8 points . It ' s a strong card for a game in which you are ahead or your opponent is throwing spies , something that gives you future board presence so you can go ahead and pass . Also , AR does work at a higher level of play , it ' s another concept like the cow when my opponent makes neutral plays , but like I said , you need to be able to build two cards up unevenly , strap the smaller one , if they play a second decoy , strap the bigger one . Overall , all in combos will fold to removal . And I explained in another response here , if someone begins building CA against you , you can just pass . They build Card Advantage by going from 6 cards to 6 cards , then you play a card and go from 6 to 5 , then they Decoy again , 6 to 6 cards , if you play a card , going 5 to 4 . If you just pass , you stay at 6 cards and they can Decoy until they are blue in the face , you will stay at 6 cards . If you played a Gold , it can ' t be scorched .