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COVID 19 Q/A: Roger Seheult & John Campbell: Lessons Learned and a Look Ahead

This premire took place on January 4, 2021.

Professor Roger Seheult, MD and John Campbell, RN, PhD discuss important COVID-19 questions, review lessons learned from 2020, and look ahead to potential developments in 2021.

He is an Associate Professor at the University of California, Riverside School of Medicine and Assistant Prof. at Loma Linda University School of Medicine

Dr. Seheult is Quadruple Board Certified: Internal Medicine, Pulmonary Disease, Critical Care, and Sleep Medicine

John Campbell, RN, BSc, MSc, PGC.Pharm, PhD is a health educator and analyst that has spent over three decades teaching students in the United Kingdom, Asia, Africa, and online with an extensive video library. Dr. Campbell also has also published textbooks on Physiology and Pathophysiology.  He publishes frequent COVID-19 updates at his YouTube channel.  A big thanks to Dr. Campbell for his participation.

Interviewer: Kyle Allred, Physician Assistant, Producer, and Co-Founder of MedCram.com


Questions discussed in this interview:

0:00 Introductions

1:44 Lessons we can learn as a society so far from this pandemic?

5:13 How do you decide what COVID 19 information sources are credible?

11:04 Role of pre-print research (non published or peer-reviewed) during a pandemic?

18:07 How can trust be maintained (or restored) in federal organizations like the CDC, FDA in the USA, and NICE in the UK?

22:33 Any new promising treatments besides steroids and remdesivir, and are doctors giving vitamin D to inpatients?

28:00 Thoughts on Ivermectin?

34:40 How will SARS-CoV-2 mutations impact the vaccine, testing, and treatments?

40:26 Thoughts on COVID vaccines authorized so far: safety and efficacy

47:46 Why not just rely on your immune system to fight off COVID-19 instead of a vaccine? 

50:37 Thoughts on “long haulers” or Post-COVID syndrome? Have we seen this with other viruses?

57:37 “Background” side effects vs vaccine or intervention side effects

1:00:48 “Predictions” regarding COVID-19 in 2021

1:08:51 If the fatality rate of COVID-19 was higher, would overall infections be lower?

1:13:44 Your personal routine for a healthy lifestyle and staying safe from coronavirus?

1:20:12 What dose of vitamin D do you take and do you take it all year?

1:25:05 Some consequences of time spent indoors (ventilation, vitamin D)

1:26:07 Vitamin D and skin color and archeology findings  

1:28:03 Should other supplements be taken with vitamin D?

1:31:25 Lessons to learn from COVID-19 testing and where should it go?


  • Quadruple Board Certified in Internal Medicine, Pulmonary Medicine, Critical Care, and Sleep Medicine.

  • Over 20 years teaching experience as both an exam preparation instructor and an assistant professor of medicine.

  • Experience as a medical director for both a Southern California Physician Assistant Program and a Respiratory Therapy Program.



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Michael Mina - Assistant Professor, Center for Communicable Disease Dynamics, Department of Epidemiology

Dr. Michael Mina, MD, PhD is an Assistant Professor of Epidemiology at Harvard T. H. Chan School of Public Health and a core member of the Center for Communicable Disease Dynamics (CCDD). He is additionally an Assistant Professor in Immunology and Infectious Diseases at HSPH and Associate Medical Director in Clinical Microbiology (molecular diagnostics) in the Department of Pathology at Brigham and Women’s Hospital, Harvard Medical School

He earned his MD and PhD degrees from Emory University, with doctoral work split between CDC, St. Jude Children’s Research Hospital, the Respiratory and Meningeal Pathogens Research Unit in Johannesburg, South Africa and the Emory Vaccine Center. He completed his post-doctoral work at Princeton University in Ecology and Evolutionary Biology (of infectious disease dynamics) with Prof. Bryan Grenfell and at Harvard Medical School in the Department of Genetics with Prof. Stephen Elledge. He completed his residency training in clinical pathology at Brigham and Women’s Hospital / Harvard Medical School.

Michael’s research combines mathematical and epidemiological models with high-throughput phage-display based serological laboratory investigations, including development of new technologies and statistical pipelines to better understand the population and immunological consequences and patterns underlying infectious diseases. Much of the work towards new technology development is performed in close collaboration with Steve Elledge at HMS. Major themes of his lab include (i) development of new approaches (laboratory and statistical methods) to enable extremely high-throughput serological surveillance of infectious pathogens; (ii) use of high-complexity antibody profiling and epidemiological data to understand the pathogenesis of vaccine preventable diseases, with a specific focus on measles infections and vaccines; (iii) elucidating broad unintended / heterologous effects of vaccines to alter transmission patterns of unrelated infectious pathogens – using serology and dynamical models; and (iv) understanding the life-history of infectious pathogens across ages, genders, geographies and times. In addition to his interests in infectious diseases, his research also explores more fundamental questions of immunity and immune repertoires: how they form, how they persist, how they are passed on and how they become perturbed during natural life-events.