The 20M DNA samples is more than just migrants. Still, 100K encounters per month can add up fast: https://www.pewresearch.org/short-reads/2023/01/13/monthly-en

The 20M DNA samples is more than just migrants. Still, 100K encounters per month can add up fast: https://www.pewresearch.org/short-reads/2023/01/13/monthly-encounters-with-migrants-at-u-s-mexico-border-remain-near-record-highs/ https://www.pewresearch.org/short-reads/2023/01/13/monthly-e...