a girl with long blond hair walks through the ancient Italian city of Ostia Antica and listens to the audio guide, quarantine, pneumonia, covid19, COVID-19, covid19, covid, 2019-ncov, sars, virus, pandemic, virus spread, attention, infection, infection, problem, hygiene, health care, ill, health, infected, carrier infection, flu epidemic, dangerous, health care, outbreak, attention, biohazard, careful, caution, danger, hygiene, sars, contagion, mers, mers-cov, prohibition, protection, no people