Happiness is a South Korean television series starring Han Hyo-joo, Park Hyung-sik, and Jo Woo-jin that is streaming, on amongst others, Netflix. It's a post-apocalyptic thriller set in a world where contagious diseases have become the new normal (post Covid-19). Happiness transpires in the not-too-distant future, when the release of a unsuccessful Covid-19 therapy drug "Next" has resulted in a worldwide pandemic known as the Rita Virus, sometimes known as "mad person disease." Rita's victims undergo brief periods of insanity and bloodlust before completely regressing into a zombie-like state. While the South Korean military and police are attempting to control