The PCR test, the greatest magician to have ever existed. If you think David Copperfield making the Statue of Liberty disappear was impressive, imagine making the liberty of 7 billion people disappear. Not only that, the PCR test made 37 million flu cases vanish in a single year, and like all good magic tricks, those flu cases are about to reappear. Now that's some top tier magic, isnâ€™t it? Or maybe that's just what we call science these days.