John Campbell is a British YouTuber, retired nurse educator, and author best known for his online health education videos. With a Ph.D. in nursing and decades of experience in healthcare, he turned to digital teaching in 2008, building a channel that became hugely popular during the COVID-19 pandemic. His clear and straightforward style attracted millions, though his content later drew criticism for spreading misinformation on vaccines and pandemic data.
By 2025, Campbell’s YouTube channel had more than 3.1 million subscribers and over 1.1 billion views, making him one of the most-watched independent medical commentators online. At 77, he continues producing daily content, blending bioscience, health updates, and his own interpretations of global medical news.
John Campbell Wiki/Bio
| Full Name | John Lorimer Campbell |
| Date of Birth | April 1947 (exact date not public) |
| Age | 77 years (as of 2025) |
| Profession | YouTuber, Retired Nurse Educator, Author |
| Hometown | Carlisle, England (Stanwix district) |
| Current Residence | United Kingdom |
| Nationality | British |
| Zodiac Sign | Aries (estimated) |
John Campbell Early Life
John Campbell was born in April 1947 in the Stanwix district of Carlisle, England. Growing up in the post-war era, he developed an early curiosity for science and healthcare. Though details about his family remain private, his background in Carlisle shaped his straightforward communication style and his lifelong commitment to teaching others.
John Campbell Education
Campbell built a strong academic foundation through multiple degrees in nursing and science. He earned a nursing diploma from the University of London, a BSc in biology from the Open University, an MSc in health science from the University of Lancaster, and a Ph.D. in nursing from the University of Bolton. His doctoral research focused on digital teaching methods, which later influenced his YouTube career.
John Campbell Career Highlights
John Campbell started his career as a nurse and later became a nurse educator at the University of Cumbria. His work included teaching in emergency nursing and mentoring healthcare workers internationally in countries like Cambodia and India.
In 2008, he launched his YouTube channel as a platform to share health lectures and nursing tutorials. For years, his content drew modest attention, but during the COVID-19 pandemic in 2020, his viewership skyrocketed. By 2022, he had over 2.6 million subscribers, and by 2025, the channel passed 3.1 million subscribers and 1.1 billion total views.
Alongside his online work, Campbell authored nursing textbooks such as Campbell’s Physiology Notes and Campbell’s Pathophysiology Notes, which remain popular among students for their clarity and affordability.
Career Milestones
| Milestone | Details |
| Nursing Diploma | University of London |
| YouTube Channel | Launched health science channel (2008) |
| Pandemic Surge | COVID-19 videos gained worldwide reach (2020) |
| Subscriber Growth | Passed 2.6M subs in 2022; 3.1M by 2025 |
| Publications | Released Campbell’s Physiology Notes and Campbell’s Pathophysiology Notes |
John Campbell Controversies
While Campbell was initially praised for clear and accessible COVID-19 explanations, he later became controversial for sharing misinformation. His videos questioned official death counts, expressed skepticism about vaccines, and promoted unproven treatments like ivermectin.
In March 2022, he cited a conference abstract to claim ivermectin reduced deaths, but the study’s authors rejected this interpretation. Fact-checkers, including Reuters, repeatedly challenged his claims, and many in the scientific community criticized his departure from medical consensus. Despite this, his videos remain popular among audiences seeking alternative views.
Also Read this:
- Dr. Ian Roberts Biography – Early Life, Age, Career, Education and More
- Russell Henley Biography – Age, Height, Wife, Family, Net Worth and More
- Howard Rubin Biography – Early Life, Age, Career, Controversies and More
- Hannah Palmer Biography – Age, Height, Career, Family, Relationship and More
- Shotaro Odate Biography – Age, Early Life, Career and More
- John Stapleton Biography – Age, Wife, Career, Family and More