Authors expect COVID-19 to exacerbate all forms of malnutrition, and estimate that people facing acute food insecurity will nearly double to 265 million this year. Analyses suggest that even short lockdown measures—combined with severe mobility disruptions and moderate food systems disruptions in low- and-middle income countries—will lead to an average 8% per capita decrease in gross national income, 6.7 million more young children experiencing wasting, and 128,605 more deaths among young children in 2020.