1. United States-Mexico Border Health Commision. Healthy Border 2020: A Prevention and Health Promotion Initiative 2020. https://www.hhs.gov/sites/default/files/res_2805.pdf. Accessed June 24, 2020.
2. WorldAtlas. The Busiest Border Crossings in the United States 2019. https://www.worldatlas.com/articles/the-busiest-border-crossings-in-the-united-states.html. Accessed July 17, 2020.
3. Statistics on border crossings at San Ysidro and Otay Mesa ports of entry;US Customs and Border Protection
4. Severe Covid-19;N Engl J Med,2020
5. Sieff K. Coronavirus on the Border: California Hospitals Overwhelmed by Patients from Mexico. The Washington Post. 2020. https://www.washingtonpost.com/world/2020/05/27/coronavirus-mexico-border/?arc404=true. Accessed June 25, 2020.