In Argentina, the socioeconomic situation of households and the price of food leads to an increasingly serious food vulnerability, further exacerbated by the COVID-19 pandemic. This article seeks to establish the effects generated by the Preventive and Compulsory Social Isolation (ASPO as indicated by its acronym in spanish) in the food insecurity of the girls, boys and adolescents of the Metropolitan Area of ​​Greater Buenos Aires (AMBA), and to determine if the social policies implemented by the government helped or not to avoid a deepening of the phenomenon. This research was approached through a longitudinal panel study on a sample of households with children from the AMBA, based on the Argentine Social Debt Survey (EDSA). The results show that the public policies of income transfers and direct food aid implemented have not been sufficient to guarantee the food security of these populations and have even been revealed insufficient to sustain the levels of incidence of food insecurity prior to COVID-19.