Producer, reporter, writer & filmmaker with a love of science and a weak spot for scary emerging diseases. Psychedelic documentarian. Was a homeschooling dad.
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Articles by Caleb Hellerman
A verdade por trás de 7 mitos comuns sobre câncer de pulmão
Segundo dados da OMS (Organização Mundial da Saúde), o câncer de pulmão é a principal causa de casos e mortes por câncer em todo o mundo, sendo o terceiro mais comum em homens. Apesar disso, o rastreamento da doença ainda é pouco comum. Muitas vezes a enfermidade é vista como uma doença que atinge apenas fumantes, mas a realidade é muito mais complexa do que se parece.
Don't ignore the warning signs: A message pays off in Nigeria
EDITOR'S NOTE: This story was reported in collaboration with the Global Health Reporting Center and support from the Pulitzer Center. The small business owner was diagnosed with appendicitis. The university lecturer and the government clerk, both struggling with stomach pain for more than a year, were told they had ulcers. In each case, the real problem turned out to be colorectal cancer.
‘Don’t ignore the warning signs’: A message pays off in Nigeria
(CNN) — The small business owner was diagnosed with appendicitis. The university lecturer and the government clerk, both struggling with stomach pain for more than a year, were told they had ulcers. In each case, the real problem turned out to be colorectal cancer. By the time they were diagnosed, all three required major surgery and nearly a year of debilitating chemotherapy treatments.
‘Don’t ignore the warning signs’: A message pays off in Nigeria
By Caleb Hellerman and Laila Johnson-Salami (CNN) — The small business owner was diagnosed with appendicitis. The university lecturer and the government clerk, both struggling with stomach pain for more than a year, were told they had ulcers. In each case, the real problem turned out to be colorectal cancer. By the time they were diagnosed, all three required major surgery and nearly a year of debilitating chemotherapy treatments.
‘Don’t ignore the warning signs’: A message pays off in Nigeria
By Caleb Hellerman and Laila Johnson-Salami (CNN) — The small business owner was diagnosed with appendicitis. The university lecturer and the government clerk, both struggling with stomach pain for more than a year, were told they had ulcers. In each case, the real problem turned out to be colorectal cancer. By the time they were diagnosed, all three required major surgery and nearly a year of debilitating chemotherapy treatments.
‘Don’t ignore the warning signs’: A message pays off in Nigeria
(CNN) — The small business owner was diagnosed with appendicitis. The university lecturer and the government clerk, both struggling with stomach pain for more than a year, were told they had ulcers. In each case, the real problem turned out to be colorectal cancer. By the time they were diagnosed, all three required major surgery and nearly a year of debilitating chemotherapy treatments.
‘Don’t ignore the warning signs’: A message pays off in Nigeria
By Caleb Hellerman and Laila Johnson-Salami (CNN) — The small business owner was diagnosed with appendicitis. The university lecturer and the government clerk, both struggling with stomach pain for more than a year, were told they had ulcers. In each case, the real problem turned out to be colorectal cancer. By the time they were diagnosed, all three required major surgery and nearly a year of debilitating chemotherapy treatments.
‘Don’t ignore the warning signs’: A message pays off in Nigeria
By Caleb Hellerman and Laila Johnson-Salami (CNN) — The small business owner was diagnosed with appendicitis. The university lecturer and the government clerk, both struggling with stomach pain for more than a year, were told they had ulcers. In each case, the real problem turned out to be colorectal cancer. By the time they were diagnosed, all three required major surgery and nearly a year of debilitating chemotherapy treatments.
‘Don’t ignore the warning signs’: A message pays off in Nigeria
By Caleb Hellerman and Laila Johnson-Salami (CNN) — The small business owner was diagnosed with appendicitis. The university lecturer and the government clerk, both struggling with stomach pain for more than a year, were told they had ulcers. In each case, the real problem turned out to be colorectal cancer. By the time they were diagnosed, all three required major surgery and nearly a year of debilitating chemotherapy treatments.
‘Don’t ignore the warning signs’: A message pays off in Nigeria
By Caleb Hellerman and Laila Johnson-Salami (CNN) — The small business owner was diagnosed with appendicitis. The university lecturer and the government clerk, both struggling with stomach pain for more than a year, were told they had ulcers. In each case, the real problem turned out to be colorectal cancer. By the time they were diagnosed, all three required major surgery and nearly a year of debilitating chemotherapy treatments.
‘Don’t ignore the warning signs’: A message pays off in Nigeria
Dr. Olusegun Alatise, center, and Dr. Peter Kingham -- shown with Dr. Zainab Yunusa-Kaltungo, left -- created the African Research Group for Oncology to improve training programs and expand opportunities for Africa-based research. Memorial Sloan Kettering See all topics Email Link Copied! EDITOR’S NOTE: This story was reported in collaboration with the Global Health Reporting Center and support from the Pulitzer Center. The small business owner was diagnosed with appendicitis.
‘Don’t ignore the warning signs’: A message pays off in Nigeria
By Caleb Hellerman and Laila Johnson-Salami (CNN) — The small business owner was diagnosed with appendicitis. The university lecturer and the government clerk, both struggling with stomach pain for more than a year, were told they had ulcers. In each case, the real problem turned out to be colorectal cancer. By the time they were diagnosed, all three required major surgery and nearly a year of debilitating chemotherapy treatments.
‘Don’t ignore the warning signs’: A message pays off in Nigeria
By Caleb Hellerman and Laila Johnson-Salami (CNN) — The small business owner was diagnosed with appendicitis. The university lecturer and the government clerk, both struggling with stomach pain for more than a year, were told they had ulcers. In each case, the real problem turned out to be colorectal cancer. By the time they were diagnosed, all three required major surgery and nearly a year of debilitating chemotherapy treatments.
‘Don’t ignore the warning signs’: A message pays off in Nigeria
EDITOR'S NOTE: This story was reported in collaboration with the Global Health Reporting Center and support from the Pulitzer Center. The small business owner was diagnosed with appendicitis. The university lecturer and the government clerk, both struggling with stomach pain for more than a year, were told they had ulcers. In each case, the real problem turned out to be colorectal cancer.
‘Don’t ignore the warning signs’: A message pays off in Nigeria
EDITOR'S NOTE: This story was reported in collaboration with the Global Health Reporting Center and support from the Pulitzer Center. The small business owner was diagnosed with appendicitis. The university lecturer and the government clerk, both struggling with stomach pain for more than a year, were told they had ulcers. In each case, the real problem turned out to be colorectal cancer.
‘Don’t ignore the warning signs’: A message pays off in Nigeria
EDITOR'S NOTE: This story was reported in collaboration with the Global Health Reporting Center and support from the Pulitzer Center. The small business owner was diagnosed with appendicitis. The university lecturer and the government clerk, both struggling with stomach pain for more than a year, were told they had ulcers. In each case, the real problem turned out to be colorectal cancer.
‘Don’t ignore the warning signs’: A message pays off in Nigeria
(CNN) — The small business owner was diagnosed with appendicitis. The university lecturer and the government clerk, both struggling with stomach pain for more than a year, were told they had ulcers. In each case, the real problem turned out to be colorectal cancer. By the time they were diagnosed, all three required major surgery and nearly a year of debilitating chemotherapy treatments.
"El cáncer nos ha quitado mucho… pero también nos ha dado algunas cosas": la historia de una familia
A Sabina McMahon le diagnosticaron osteosarcoma, un tipo de cáncer de hueso, cuando tenía 12 años. Tras quimioterapia, radioterapia y cirugía para extirpar el hueso de la pierna afectado, estuvo libre de cáncer durante más de un año, pero finalmente el cáncer se extendió a sus pulmones, la primera de cinco recaídas. Sobre todo cuando afecta a pacientes jóvenes, el cáncer repercute en toda la familia.
"El cáncer nos ha quitado mucho… pero también nos ha dado algunas cosas": la historia de una familia
A Sabina McMahon le diagnosticaron osteosarcoma, un tipo de cáncer de hueso, cuando tenía 12 años. Tras quimioterapia, radioterapia y cirugía para extirpar el hueso de la pierna afectado, estuvo libre de cáncer durante más de un año, pero finalmente el cáncer se extendió a sus pulmones, la primera de cinco recaídas. Sobre todo cuando afecta a pacientes jóvenes, el cáncer repercute en toda la familia.
"El cáncer nos ha quitado mucho… pero también nos ha dado algunas cosas": la historia de una familia
A Sabina McMahon le diagnosticaron osteosarcoma, un tipo de cáncer de hueso, cuando tenía 12 años. Tras quimioterapia, radioterapia y cirugía para extirpar el hueso de la pierna afectado, estuvo libre de cáncer durante más de un año, pero finalmente el cáncer se extendió a sus pulmones, la primera de cinco recaídas. Sobre todo cuando afecta a pacientes jóvenes, el cáncer repercute en toda la familia.
"El cáncer nos ha quitado mucho… pero también nos ha dado algunas cosas": la historia de una familia
A Sabina McMahon le diagnosticaron osteosarcoma, un tipo de cáncer de hueso, cuando tenía 12 años. Tras quimioterapia, radioterapia y cirugía para extirpar el hueso de la pierna afectado, estuvo libre de cáncer durante más de un año, pero finalmente el cáncer se extendió a sus pulmones, la primera de cinco recaídas. Sobre todo cuando afecta a pacientes jóvenes, el cáncer repercute en toda la familia.
"El cáncer nos ha quitado mucho… pero también nos ha dado algunas cosas": la historia de una familia
A Sabina McMahon le diagnosticaron osteosarcoma, un tipo de cáncer de hueso, cuando tenía 12 años. Tras quimioterapia, radioterapia y cirugía para extirpar el hueso de la pierna afectado, estuvo libre de cáncer durante más de un año, pero finalmente el cáncer se extendió a sus pulmones, la primera de cinco recaídas. Sobre todo cuando afecta a pacientes jóvenes, el cáncer repercute en toda la familia.
‘Cancer has taken so much … but it’s also given us a few things’: One family’s journey Original
See all topics Email Link Copied! EDITOR’S NOTE: This collection of personal essays was developed in collaboration with the Global Health Reporting Center, with support from the Pulitzer Center. The McMahon family enjoys a trip to Rio de Janeiro in 2023. Courtesy McMahon Family Sabina McMahon was diagnosed with osteosarcoma, a form of bone cancer, when she was 12 years old.
A healthier gut may be key to cancer care
(CNN) — As a budding specialist in bloodborne cancers like leukemia, Dr. Marcel van den Brink learned how to perform one of the most delicate high-wire acts in medicine: Starting in the early 1990s, many of his seriously ill patients had sophisticated procedures to rebuild, or reinstall, a new immune system.
A healthier gut may be key to cancer care
(CNN) — As a budding specialist in bloodborne cancers like leukemia, Dr. Marcel van den Brink learned how to perform one of the most delicate high-wire acts in medicine: Starting in the early 1990s, many of his seriously ill patients had sophisticated procedures to rebuild, or reinstall, a new immune system.
A healthier gut may be key to cancer care
Dr. Marcel van den Brink says he and his colleagues came to recognize that some aggressive cancer treatment was "causing a lot of collateral damage." - City of Hope EDITOR'S NOTE: This story was reported in collaboration with the Global Health Reporting Center with support from the Pulitzer Center.
How AI is helping researchers develop antibiotics to fight drug-resistant infections
May 27, 2026 6:35 PM EDT Share on Facebook Share on Twitter Audio Drug-resistant infections are a major public health threat around the world. To fight them, scientists are constantly trying to find and develop new antibiotics. Now, researchers say artificial intelligence is helping speed their search. Miles O'Brien reports.
Busting 7 myths about lung cancer Original
Dr. Lecia Sequist, here with Dr. Florian Fintelmann at Mass General Brigham Cancer Institute in Boston, helped develop an AI program that can “look” at a single CT scan and generate a “risk score” corresponding to the likelihood of the person developing cancer. Mass General Brigham Cancer Institute See all topics Email Link Copied! EDITOR’S NOTE: This story was reported in collaboration with the Global Health Reporting Center with support from the Pulitzer Center.
Like ‘driving to San Francisco and back, every week’: In rural America, cancer patients face tall hurdles to get care
By Caleb Hellerman (CNN) — Andy Henard is used to doing things for himself. That’s the way to run a successful ranch and farming operation in North Texas. “I’ve always been a big strong guy. If I need to load 50 sacks of wheat seed weighing 100 pounds, I just do it,” says Henard, 76, a former Texas A&M defensive end. But for the better part of a year, it was all he could do to drag himself from the couch to his bedroom.
Tras un año de incertidumbre, los investigadores del cáncer ven señales prometedoras para las vacunas de ARNm
Nota del editor: Este reportaje se realizó en colaboración con el Centro de Información sobre Salud Global, con el apoyo del Centro Pulitzer. La vida de Vita Sara Blechner cambió un sábado por la tarde. La bibliotecaria de una escuela secundaria estaba en su casa en Oceanside, Nueva York, cuando sintió un fuerte dolor en la espalda. Después de que una pastilla para el reflujo ácido no lograra aliviar la sensación de ardor, su esposo le sugirió ir a urgencias.
After a year of turmoil, cancer researchers see promising signs for mRNA vaccines Original
MRNA is known to most people from high school science classes or for its use in Covid-19 vaccines. Daniel Leal/AFP/Getty Images See all topics Email Link Copied! EDITOR’S NOTE: This story was reported in collaboration with the Global Health Reporting Center with support from the Pulitzer Center. Vita Sara Blechner’s life changed on a Saturday afternoon. The middle school librarian was home in Oceanside, New York, when she felt shooting pains in her back.
Like ‘driving to San Francisco and back, every week’: In rural America, cancer patients face tall hurdles to get care Original
See all topics Email Link Copied! EDITOR’S NOTE: This story was reported in collaboration with the Global Health Reporting Center with support from the Pulitzer Center. Andy Henard is used to doing things for himself. That’s the way to run a successful ranch and farming operation in North Texas. “I’ve always been a big strong guy. If I need to load 50 sacks of wheat seed weighing 100 pounds, I just do it,” says Henard, 76, a former Texas A&M defensive end.
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