Coronavirus Pandemic Update 73: Relapse, Reinfections, & Re-Positives - The Likely Explanation

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COVID-19 Update 73 with Roger Seheult, MD. All coronavirus updates available free at

After several reports of COVID 19 reinfections or "re-positives" (a positive test, followed by a negative test, followed by a positive test), there have been lingering questions: Does a COVID-19 infection provide immunity? Is it possible to get the new coronavirus twice? New data from the Korean CDC sheds light on this question and Dr. Seheult illustrates how RT-PCR COVID-19 testing works and what may be happening when a person appears to be reinfected. Also, the first SARS-CoV-2 antigen test has been approved by the FDA. (This video was recorded on May 20, 2020)
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Links referenced in this video:

Johns Hopkins Tracker -



Detailed Animation About How RT-PCR Works:

FDA Press Release -

Korean CDC Article -

NBC -

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Some previous videos from this series (visit for the full series):
- Coronavirus Pandemic Update 72: Dentists; Diabetes; Sensitivity of COVID-19 Antibody Tests:
- Coronavirus Pandemic Update 71: New Data on Adding Zinc to Hydroxychloroquine +
Azithromycin:
- Coronavirus Pandemic Update 70: Glutathione Deficiency, Oxidative Stress, and COVID 19
- Coronavirus Pandemic Update 69: "NAC" Supplementation and COVID-19 (N-Acetylcysteine)
- Coronavirus Pandemic Update 68: Kawasaki Disease; Minority Groups & COVID-19:
- Coronavirus Pandemic Update 67: COVID-19 Blood Clots - Race, Blood Types, & Von Willebrand Factor
- Coronavirus Pandemic Update 66: ACE-Inhibitors and ARBs - Hypertension Medications with COVID-19
- Coronavirus Pandemic Update 65: COVID-19 and Oxidative Stress (Prevention & Risk Factors)
- Coronavirus Pandemic Update 64: Remdesivir COVID-19 Treatment Update
- Coronavirus Pandemic Update 63: Is COVID-19 a Disease of the Endothelium (Blood Vessels and Clots)?
- Coronavirus Pandemic Update 62: Treatment with Famotidine (Pepcid)?
- Coronavirus Pandemic Update 61: Blood Clots & Strokes in COVID-19; ACE-2 Receptor; Oxidative Stress
- Coronavirus Pandemic Update 60: Hydroxychloroquine Update; NYC Data; How Widespread is COVID-19?
- Coronavirus Pandemic Update 59: Dr. Seheult's Daily Regimen (Vitamin D, C, Zinc, Quercetin, NAC)
- Coronavirus Pandemic Update 58: Testing; Causes of Hypoxemia in COVID 19 (V/Q vs Shunt vs Diffusion)
- Coronavirus Pandemic Update 57: Remdesivir Treatment Update and Can Far-UVC Disinfect Public Spaces?

All coronavirus updates are at (including a discussion of that data for coronavirus UK, coronavirus NYC, COVID 19 testing and reinfections) and we offer many other medical topics (ECG Interpretation, strokes, thrombosis, pulmonary embolism, myocardial infarction, hypercoagulation, hypertension, anticoagulation, DKA, acute kidney injury, influenza, measles, mechanical ventilation, etc.).

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Speaker: Roger Seheult, MD
Board Certified in Internal Medicine, Pulmonary Disease, Critical Care, and Sleep Medicine.

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