it was just a normal day on earth, many people working, many people studying, and you, were minding your own business, it was year of 2019, everything was fine, until you saw the newscaster spoke in the online broadcast, they were saying that there's an unexplained phenomena that caused people to get sick severely, and they often call this phenomenon "COVID-19", meanwhile, you were thinking it was just a hoax, until suddenly, you heard people coughing and sneezing around you