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 past twenty years. The contagion can also occur by inhalation of aerosolized viruses, capable floating in air for long times (in closed spaces) and traveling unknown distances. A lesson from history shows exclusive infectious disease hospitals with multiple building are still a modern architectural choice. Individual spaces needed this important way to reduce viral load. Nowadays, restrictions should involve not only interpersonal relationships but environmental measures.