Households in the US with foreign-born members are not eligible for some federal relief funds and were deterred from utilizing safety net programs after the public charge rule. However, during the COVID-19 pandemic, some states and local authorities created temporary welfare programs for immigrant households. We combine information about local governments providing additional transfers and children's health data from the National Survey of Children's Health (NSCH) yearly data from 2016 to 2020, including information on children's health status, health care need, utilization, government assistance, and insurance. To identify likely mixed-status households, we use the adults' information on being foreign-born and of Hispanic origin. Leveraging the variation of local governments providing additional welfare transfers to this group and the timing of the transfers, we test for differential effects on children between the mixed-status household and other groups of interest, including households with US-born only members, white, Hispanic, or black as a comparison, controlling for individual characteristics, state fixed effects, and year fixed effects.