And that meant we didn't know that, while we were looking for sick people, there were many, many, many more people without symptoms that were in society spreading the infection in a way that was not detectable, below the radar screen.
Y eso significaba que no sabíamos que mientras buscábamos la gente enferma, había mucha, mucha más gente sin síntomas estaba en la sociedad propagando la infección de manera no detectable, bajo la pantalla radar.