Justine Po, MD
Justine smiling with her arms resting on a large illuminated World Cancer Congress Hong Kong 2026 sign

Hi, I'm Justine.

I’m a resident physician focused on whole-person prevention and treatment of risk-modifiable cancers in low-resource settings.

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World Cancer Congress, Hong Kong, 2026

Community-delivered prevention and care

Since February 2026, ARCH Collaborative has hosted a monthly clinic at Little Tokyo Service Center’s Umeya supportive housing complex in Skid Row, home to about 200 residents.

Services and partners

Each clinic offers primary care, harm reduction, medication reconciliation, mutual aid, and specialist referrals, in close partnership with each patient’s case manager to ensure continuity across visits.

Dr. Jerry Abraham of Kedren Health serves as our attending physician. We additionally partner with Los Angeles General Medical Center, the USC Mann School of Pharmacy, and the Los Angeles County Department of Public Health harm reduction team to provide a full spectrum of services to our patients. We are now expanding point-of-care preventive screening and patient navigation.

Clinic team kneeling and standing around a Kedren Health banner
Clinicians and students gathered around an ARCH Collaborative table in a clinic room
Umeya Street Medicine Clinic Teams, 2026
  • 70+patient visits in the first 9 months
  • 12services offered
  • 50+volunteers
  • 5partner organizations

Research

$102,546

Research funding awarded in medical school

Including fellowships, scholarships, and NIH-funded grants

  1. Policy and infrastructure shape patient-centered outcomes in oncology

    Among 31,126 adults with cancer in the NIH All of Us cohort, living more than 15 minutes from a public transit stop was associated with worse quality of life, pain, and fatigue. We presented this work at the World Cancer Congress in Hong Kong and the IARC 60th Anniversary Conference.

Limited transit access was associated with worse pain, fatigue, and quality of life among adults with cancer

Adjusted odds with a transit stop more than 15 minutes away, compared with 15 minutes or less

Source: NIH All of Us Research Program.

Barriers to care shift across the lifespan among 15,637 cancer survivors

ASCO Conquer Cancer Merit Award, top 1.8% of 7,775 abstracts

  1. Ages 18 to 39Financial support, elder care resources, and medical notes for time off work
  2. Ages 40 to 49Child care and transportation support
  3. Ages 50 to 74Transportation support

Odds of forgoing care because of cost fell sharply with age

Source: NIH All of Us Research Program. Presented at ASCO, 2025.

  1. Preventive medicine and lifestyle approaches remain vastly underutilized despite robust evidence of improvements in health outcomes

    Es Tiempo is a culturally tailored cervical cancer screening campaign in eastern Los Angeles. We surveyed 673 Hispanic women living in the campaign area (JNCI Cancer Spectrum, 2025).

    Campaign recall was nearly double the US benchmark

    9 in 10 were likely to schedule a Pap smear

    Benchmark: US awareness of government healthy-eating campaigns (Goodman et al., 2021).

    Built with partners across sectors

    Community-based
    • Community advisory board
    • Promotores de salud
    • Clínica Monseñor Oscar Romero, a federally qualified health center
    Academic
    • USC Norris Comprehensive Cancer Center
    • Keck School of Medicine of USC
    Government
    • Los Angeles County Department of Public Health, Office of Women’s Health
    • Los Angeles General Medical Center
    Multidisciplinary
    • USC Annenberg School for Communication and Journalism
    • Designmatters at ArtCenter College of Design
  2. A framework for resilient communities and health systems

    In our review of 46 studies across 19 countries, we developed a framework of community-based solutions to minimize care disruptions during natural disasters (PLOS Global Public Health, 2025).

    • Community health workers and volunteersTrained community members used mobile check-ins to conduct symptom screening and encourage medication adherence of neighbors with chronic diseases.
    • TechnologyRemote blood pressure and glucose monitoring enabled continued health surveillance, with just-in-time text alerts helping at-risk patients shelter against extreme heat.
    • LogisticsEvacuation vehicles should be contracted from outside the disaster zone and equipped to handle durable medical equipment, such as wheelchairs and oxygen.

    3.5×Citation rate compared with a typical NIH-funded paper in its fieldNIH iCite, November 2026

    Wildfire smoke and lung cancer · NIEHS P30ES007048

    A C-130 firefighting aircraft releases a long red plume of fire retardant over a smoky hillside
    Modular Airborne Firefighting System C-130E Drops Fire Retardant on the Simi Fire, Southern California, 2003. Credit: Staff Sgt. Alex Koenig, U.S. Air Force

    I was awarded an NIEHS-funded grant to study how wildfire smoke affects mortality among people living with lung cancer. Using an open-source machine learning ensemble model, we estimated short- and long-term exposure to wildfire and non-wildfire fine particulate matter (PM2.5) for patients across the California Cancer Registry.

    Few studies have separated wildfire smoke from other sources of PM2.5 among cancer survivors. Because wildfires are episodic, we also measured exposure as smoke days, severe smoke days, and smoke waves, not only as average levels.

Selected publications

Global Oncology

About two-thirds of cancer deaths occur in low- and middle-income countries, yet oncology remains largely neglected in global health. I aim to close that gap by pairing proven prevention with community partnerships and accessible technology.

Philippines

Promoting cancer prevention among children in street situations

Manila is my family's hometown. In April 2026, I joined ChildHope Philippines to teach tobacco use prevention and to help provide care at its KliniKalye Street Medicine Van.

I look forward to returning to the Philippines to improve cancer outcomes for urban unhoused populations. I also hope to grow this work by partnering to pilot, fund, and sustain solutions.

Justine with ChildHope Philippines staff and young participants holding tobacco prevention worksheetsChildren seated in a circle beside the KliniKalye Street Medicine Van as ChildHope staff lead a sessionJustine kneeling beside a child in front of a screen that says SalamatA child’s drawing of a smoke-free life on a Tagalog tobacco prevention worksheet
ChildHope Philippines, Manila, 2026. Posted With Permission.

Japan

Studying diet, H. pylori, and gastric cancer risk at the National Cancer Center of Japan

Dean’s Research Scholar, National Cancer Center of Japan, 2024 to 2025

Best Poster, Asian National Cancer Centers Alliance Annual Scientific Meeting, Singapore, 2024

  • Mentored by Dr. Manami Inoue, the first Asian chair of the IARC Scientific Council
  • Built Cox proportional hazards models of diet and H. pylori across a multicenter cohort
Justine standing beside a blue conference backdrop
Japanese Cancer Association Annual Meeting, Kanazawa, 2025
About fifty researchers standing together beneath an Asia Cohort Consortium General Membership Meeting 2024 banner
Asia Cohort Consortium General Membership Meeting, Seoul National University, 2024

Kenya

Tracing how COVID-19 disrupted chronic disease care

Breman Global Health Fellow, African Population and Health Research Center, Nairobi, 2022

  • Selected as one of two USC students each year for chronic disease research at APHRC headquarters
  • Analyzed patient and provider interviews from all eight provinces for the Global Effort on COVID-19 (GECO) study
  • Presented findings on care disruptions and financial toxicity at APHRC and at USC

I reflected on this work in two essays for the USC Institute on Inequalities in Global Health: Inequality and Parachutes and The (Future) Flying Doctor.

Justine in scrubs between a fellow trainee and a colleague at an oncology outreach clinic
Visiting Aga Khan University Hospital oncology outreach clinic, Nairobi, 2022
Four colleagues in masks standing in front of a projected presentation slide
African Population and Health Research Center, Nairobi, 2022
  1. Berkeley2014 to 2018B.S., B.A., Public Health and Business Administration
    Phi Beta Kappa
  2. San Francisco2018 to 2020Project Associate
    UCSF National Adolescent & Young Adult Health Information Center (NAHIC)
  3. Cambridge2020Summer Research Fellow
    University of Cambridge (remote due to COVID-19)
  4. Los Angeles2021 to 2026M.D., Keck School of Medicine of USC
    Distinction in Research and Community Service
  5. Nairobi2022Breman Global Health Fellow
    African Population and Health Research Center
  6. Tokyo2024 to 2025Dean’s Research Scholar
    National Cancer Center Japan
  7. Seoul2024Asia Cohort Consortium Meeting
    Seoul National University
  8. Singapore2024Asian National Cancer Centers Alliance Annual Scientific Meeting
    Best Poster
  9. New Orleans2026 to presentInternal Medicine-Pediatrics Residency
    Tulane University
  10. Geneva2024World Cancer Congress
    Poster Presentation (remote)
  11. Chicago2025ASCO Annual Meeting
    Conquer Cancer Merit Award
  12. Manila2026Cancer Prevention and Street Medicine
    ChildHope Philippines
  13. Lyon2026IARC 60th Anniversary Conference
    Poster Presentation
  14. Hong Kong2026World Cancer Congress
    Poster Presentation

Building community resilience against extreme weather and chronic disease

A large group of volunteers and partners standing in front of white tents and a stone building at MacArthur Park
Volunteers, City, and Community Partners Before Opening, Los Angeles Environmental Health Fair, 2026. Credit: Roxy Morris

Connecting MacArthur Park residents to lung cancer screening, insurance enrollment, and extreme heat resources

As CEO of ARCH Collaborative, I led the Los Angeles Environmental Health Fair with the office of Councilmember Eunisses Hernandez, Clínica Romero, KYCC, the California Lung Cancer Coalition and more than ten other partners, and together we served an estimated 300 community members.

Watch the recap

  • 300estimated community members served
  • 39+volunteers
  • 14+city and community partners
  • 3focus areas: preventive health, extreme weather, & community-building
  • Yellow tote bags packed with bananas, greens, and oranges, seen from aboveGrocery Giveaway
  • Residents wait in line, seen from behind, under white tents along the parkFair Attendees and Booths
  • A volunteer in a safety vest carries an air purifier box above a stack of boxes, his face hidden behind itAir Purifier Giveaway
  • A screening table with a Clínica Romero form, sharps container, and a Medi-Cal and Covered California signInsurance Enrollment and Screening
  • Gloved hands perform a fingerstick glucose check at a green table set with lancets and alcohol padsPoint-of-Care Glucose Testing
  • Gloved hands of a Central City Neighborhood Partners volunteer fill a yellow grocery bagPacking Grocery Bags
  • Health education pamphlets fanned across a table beside a water bottleEducational Brochures

Los Angeles Environmental Health Fair, MacArthur Park, 2026. Credit: Roxy Morris and Maria Rozanova

Improving Extreme Weather & Health Knowledge in Underserved Communities

At the 2026 LA Environmental Health Fair, we surveyed attendees to gauge intervention effectiveness. 72% of those surveyed had Medi-Cal or no insurance, and 73% spoke primarily Spanish at home.

Share of attendees who knew how to take each step, before and after the fair

Checking the Air Quality Index

Limiting Smoke Exposure

Finding a Cooling Center

Source: ARCH Collaborative attendee survey, April 2026.

The ARCH team holding a green ARCH Collaborative banner beneath a Koreatown Youth and Community Center Prevention Education Unit sign
ARCH Scholars Roundtable with Koreatown Youth and Community Center, 2025

Preparing the next generation of environmental health leaders

Through ARCH Scholars, our NIH-funded bilingual program, high school students in Los Angeles build environmental health solutions of their own. At our Fall 2025 Roundtable with LA City Council District 1 and Koreatown Youth and Community Center, youth leaders from Westlake designed solutions for their neighborhood, and they voted on how to direct more than $12,000 in community investment. The scholars’ median age was 15, and most spoke Spanish at home.

After a single session, the share of scholars who agreed they know how communities can address climate and health problems doubled

Source: ARCH Scholars Roundtable pre- and post-session surveys, Fall 2025.

Read the Roundtable Report

About Me

Portrait of Justine Po in a navy blazer

Each year, medical advances are expanding possibilities for life-saving cancer care. However, whether someone can benefit from these advances largely depends on the systems around them: how far it is to the nearest clinic, whether information is accessible in their language, and whether care gets delayed or disrupted due to cost or other barriers.

I hope to dedicate my career to demonstrating how quality cancer care can be delivered in low-resource settings, so that every patient has access to the care they need.

Outside of medicine

  • Kuri Along for the Ride at CicLAvia, Chinatown, Los Angeles, 2025
  • Runners crowding under the Bay to Breakers start banner between downtown towers
    Bay to Breakers Start Line, San Francisco, 2019
  • Rows of colorful umbrellas strung above a street below the Château de l’Empéri
    Umbrella Street Below the Château de l’Empéri, Salon-de-Provence, France, 2021
  • A loaded touring bike on a paved path through green hills
    Bike Touring Through Chavanay, France, 2021
  • Justine giving a thumbs-up beside her upturned bike during a roadside repair
    Roadside Bike Repair, Giverny, France, 2021
  • Stone terraces of Machu Picchu under low clouds
    Machu Picchu, Peru, 2022
  • A touring bike parked by a seaside railing at sunset
    Cycling the Coast, Yakumo, Japan, 2022
  • Justine smiling in a riding helmet and body armor on a winding mountain road
    Biking in Peru, 2022
  • Snow-capped Mount Fuji framed by red autumn maples above the town
    Mount Fuji from Arakurayama Sengen Park, Fujiyoshida, Japan, 2024
  • Swimmers in a turquoise lagoon below steep jungle cliffs
    Island Hopping, Coron, Philippines, 2024

I love painting, running, and cycling, best with an audiobook playing and my senior dog Kuri along for the ride. Slowly working toward my yoga teacher training certification, and have practiced vinyasa yoga for over a decade.

Past runs and cycles
  • 2019Bay to Breakers, San Francisco
  • 2019Berkeley Half Marathon
  • 2021WHO COVID-19 Response Fund Fundraiser: Cycling from Nice to Le Havre, France
  • 2022Los Angeles Marathon
  • 2022Cycling from Wakkanai to Sendai, Japan
  • 2023Joshua Tree Half Marathon
  • 2024AYA Cancer Program at USC Fundraiser: Los Angeles Marathon

My favorite reads

Visit the Book Club

Along the way

Justine with her arms open behind a large World Cancer Congress Hong Kong 2026 sign
World Cancer Congress, Hong Kong, 2026
Watercolor card reading Welcome to California, with a yellow bicycle sign, orange poppies, and the Golden Gate Bridge
Welcome to California, Watercolor and Ink on Paper, Berkeley, 2019
A screening table with a Clínica Romero form, sharps container, and a Medi-Cal and Covered California sign
Clínica Romero Screening Table, Los Angeles Environmental Health Fair, 2026. Credit: Maria Rozanova
Justine leading a classroom session in Manila
Tobacco Use Prevention Session with ChildHope Philippines, Manila, 2026. Posted With Permission.
Ferries crossing a blue harbor with the Hong Kong skyline behind them
Victoria Harbour, Hong Kong, 2026
Justine with a conference tote beside the IARC 60th anniversary and World Cancer Research Fund International displays
IARC 60th Anniversary Conference, Lyon, France, 2026
A volunteer in a safety vest carries an air purifier box above a stack of boxes
Air Purifier Giveaway, Los Angeles Environmental Health Fair, 2026. Credit: Roxy Morris
Student volunteers on a chalk-drawn street in front of white tents
Volunteers with Councilmember Eunisses Hernandez, Los Angeles Environmental Health Fair, 2026
Watercolor of three hands in warm skin tones, each holding a flower against a blue, yellow, or teal panel
Hands and Skin Tones, Watercolor and Ink on Paper, 2019
Justine on a bike with her dog peeking out of her backpack
Cycling with Kuri, Los Angeles, 2025
Clinic team around a Kedren Health banner
Umeya Street Medicine Clinic Launch with Kedren Health, Skid Row, 2026
Justine in gardening gloves flashing a peace sign beside a newly planted street tree
ARCH Collaborative Tree Planting Volunteer Event, Gates Street Elementary School, Lincoln Heights, 2025
A child drawing with blue and orange chalk on the pavement, face not shown
Chalk Art at the Los Angeles Environmental Health Fair, 2026. Credit: Roxy Morris
Justine with four colleagues in front of a ChildHope Philippines sign
With the ChildHope Philippines Team, Manila, 2026
Justine sitting on the grass after the Los Angeles Marathon, holding up her finisher medal
Finisher Medal, Los Angeles Marathon, 2024
Bags of oranges stacked on a produce box
Fresh Produce, Los Angeles Environmental Health Fair, 2026. Credit: Roxy Morris

Contact

I am always glad to connect with collaborators, students, and community partners, and I welcome invitations to speak.