The micro-parklands of the Emergency Hospital in Madrid designed by Cristina Jorge_Cjcpaisaje create a natural system of prefabricated elements following the aim of rapid implementation, isolation, and protection taking as reference the simple integrated system of living microorganisms. These enclosures provide circular areas where patients, visitors, or healthcare professionals can meet in secret places surrounded by trees and shrubs or they can walk around large green islands. The landscape architecture project has a surface of 7,434 sqm and occupies a plot of 69,781 sqm located in the Hortaleza district of Madrid. This plot, belonging to the previous City of Justice project on the north side of the Medicine Legal building, is destined for a public hospital constructed in 100 days during the CovId-19 pandemic. The plot is trapezoidal and has a drop of 4.5 meters. Due to dry climatic conditions, adapted species with low water demand have been selected reducing the risk of allergies or respiratory problems. The topography has been modified to conserve rainwater and direct it to green areas that act as sponges that reduce runoff, store water, remove sediment and pollutants and release it into other ecosystems. Viruses cannot reproduce outside a host cell and cannot metabolize on their own. Beyond viruses, it is the other vital system of primitive organisms that have guided the design and distribution of these external areas that act against possible infections.