SAN DIEGO — The line for the free clinic that serves migrant families in Tijuana, Mexico, starts before sunrise. After the clinic opens, its staff, a mix of employees and volunteers, take patients one by one to tables in an outdoor hallway — a mitigating measure in the ongoing pandemic. Patients needing more in-depth exams are taken to one of the clinic’s two private rooms. Pregnant women meet with midwives in another area. With Mexico’s already struggling medical system further hamstrung by COVID-19, asylum-seekers who are waiting indefinitely for the United States to begin processing them ha…
