Health effects and user perceptions of the US Customs and Border Patrol One™ mobile application: A qualitative analysis among asylum seekers at the Mexico-US border.

Background: The number of migrants at the Mexico-US border has increased to historic levels, and frequently changing immigration policy impacts this population as they await entry into the US. This study evaluated the usability and health effects of the Customs and Border Protection (CBP) One™ mobile application among asylum seekers near the US port of entry in Reynosa, Mexico. Methods: We conducted semi-structured qualitative interviews with 20 asylum seekers in Reynosa, Mexico, in February 2023. Our objective was to explore the subjective experiences of migrants, usability of CBP One™, and presence of perceived health effects from using the application. Interviews were conducted until saturation occurred, transcribed verbatim into Word, coded in NVivo using a validated, team-based coding methodology, and analyzed according to internal domains, external domains, and health effects regarding CBP One™. Results: Twenty participants originated from eight countries throughout Latin America and the Caribbean. In total, 18 subthemes were identified among internal, external, and effects domains. Internal themes included a confusing application interface (80%), technical malfunction (60%), and perceived racial bias from the photo-capture features (15%). External themes challenging CBP One™ use included unavailable appointment slots (80%), inequity and inaccessibility (35%), and inadequate internet (25%). Most perceived effects were negative (85%), including worsening mental health effects (40%), exacerbation of pre-existing physical conditions (35%), and forgoing health expenditures to pay for internet (25%). Conclusions: Our findings suggest that asylum seekers at the Reynosa port of entry perceive CBP One™ negatively, with detrimental effects towards their mental and physical health. This study highlights how immigration policy can influence health and suggests that more creative and humane approaches are needed for people seeking asylum at the Mexico-US border.

Epidemiology of asylum seekers and refugees at the Mexico-US border: a cross-sectional analysis from the migrant settlement camp in Matamoros, Mexico.

BACKGROUND: The number of migrants and asylum seekers at the Mexico-US border has increased to historic levels. Our objective was to determine the medical diagnoses and treatments of migrating people seeking care in humanitarian clinics in Matamoros, Mexico. METHODS: We conducted a cross-sectional study of patient encounters by migrating people through a humanitarian clinic in Matamoros, Mexico, from November 22, 2019, to March 18, 2021. The clinics were operated by Global Response Medicine in concert with local non-governmental organizations. Clinical encounters were each coded to the appropriate ICD-10/CPT code and categorized according to organ system. We categorized medications using the WHO List of Essential Medicines and used multivariable logistic regression to determine associations between demographic variables and condition frequency. RESULTS: We found a total of 8,156 clinical encounters, which included 9,744 diagnoses encompassing 132 conditions (median age 26.8 years, female sex 58.2%). People originated from 24 countries, with the majority from Central America (n = 5598, 68.6%). The most common conditions were respiratory (n = 1466, 15.0%), musculoskeletal (n = 1081, 11.1%), and skin diseases (n = 473, 4.8%). Children were at higher risk for respiratory disease (aOR = 1.84, 95% CI: 1.61-2.10), while older adults had greater risk for joint disorders (aOR = 3.35, 95% CI: 1.73-6.02). Women had decreased risk for injury (aOR = 0.50, 95% CI: 0.40-0.63) and higher risk for genitourinary diseases (aOR = 4.99, 95% CI: 3.72-6.85) compared with men. Among 10,405 medications administered, analgesics were the most common (n = 3190, 30.7%) followed by anti-infectives (n = 2175, 21.1%). CONCLUSIONS: In this large study of a migrating population at the Mexico-US border, we found a variety of clinical conditions, with respiratory, musculoskeletal, and skin illnesses the most common in this study period which encompassed a period of restrictive immigration policy and the first year of the COVID-19 pandemic.

Bullseye dielectric cavities for photon collection from a surface-mounted quantum-light-emitter.

Coupling light from a point source to a propagating mode is an important problem in nano-photonics and is essential for many applications in quantum optics. Circular "bullseye" cavities, consisting of concentric rings of alternating refractive index, are a promising technology that can achieve near-unity coupling into a first lens. Here we design a bullseye structure suitable for enhancing the emission from dye molecules, 2D materials and nano-diamonds positioned on the surface of these cavities. A periodic design of cavity, meeting the Bragg scattering condition, achieves a Purcell factor of 22.5 and collection efficiency of 80%. We also tackle the more challenging task of designing a cavity for coupling to a low numerical aperture fibre in the near field. Finally, using an iterative procedure, we study how the collection efficiency varies with apodised (non-periodic) rings.