ancient Italian city – Ostia Antica, 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, contamination, danger, hygiene, sars, contagion, mers, mers-cov, prohibition, protection, flu epidemic, coronavirus disease, panic, Italy, nobody, no people, no person