Coronavirus disease 2019 : a lesson from history

Viral infections have become an increasingly worsening threat, SARS-Cov-2 is the third coronavirus that emerged during the past twenty years. The contagion can also occur by inhalation of aerosolized viruses, capable of floating in the air for long times (in closed spaces) and traveling unknown distances. Alesson from history shows that exclusive infectious disease hospitals with multiple building are still a modern architectural choice. Individual spaces are needed and this is an important way to reduce the viral load. Nowadays, the restrictions should involve not only the interpersonal relationships but also environmental measures.