The COVID-19 has asked the world to stay at home and wash their hands, the top two sanitary recommendations to fight the virus. However, what happens when there is no home and no running water? The economic crisis triggered by the health crisis will increase poverty, unemployment, and consequently, housing informality. How could both health and employment issues be solved at the same time and quickly? For us, the other vaccine available against the virus is the house. Under this line, The Basic Services Unit proposes a prefabricated module that can be built in just 5 weeks and concentrates the sanitation infrastructure and the structure for growth. This allows a family to count with the minimum sanitary needs in 40 days, and to later expand this emergency structure into a middle-class standard housing.