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Harry Oken, MD

Harry Oken is an internal medicine physician in practice in Howard County and an adjunct professor of medicine at the University of Maryland. He graduated from the University of Maryland in 1983 and completed internal medicine training there from 1983 to 1987, including a year as chief resident.

He taught ambulatory medicine to internal medicine residents for twenty-eight years as a clinical professor of medicine, and he served for fourteen years as chairman of medicine at Howard County General Hospital. He has been medical director for the Columbia Association since 2007.

Oken has been recognized as a Best Doctor in America and as a Baltimore magazine "Top Doc." He has published articles in professional journals and is the coauthor of BOOM: Boost Our Own Metabolism.

mRNA hype moves faster than the evidence behind it

Harry Oken, MD
Medications
September 12, 2026

mRNA technology may be both a remarkable scientific tool and a very effective marketing machine. Those are not mutually exclusive. The challenge is distinguishing a promising platform, a useful treatment, and a product promoted beyond what the evidence can support.

In early 2020, COVID-19 was frightening. We did not know how readily the original strain would spread or how much illness and death it would cause. We soon learned that risk …

Read more…

mRNA hype moves faster than the evidence behind it

Post-vaccination syndrome treatment update for 2026

Harry Oken, MD
Medications
August 16, 2026

A year ago, I wrote about post-vaccination syndrome (PVS) after mRNA COVID-19 vaccination as a real, patient-reported problem that remains poorly defined and understudied. I described my wife’s experience and called for serious study of patients with persistent symptoms after vaccination.

My wife’s prolonged, relapsing illness prompted me to write publicly about PVS. Her symptoms began approximately two weeks after her third mRNA COVID-19 vaccination in late 2021. Since then, …

Read more…

Post-vaccination syndrome treatment update for 2026

mRNA post vaccination syndrome: Is it real?

Harry Oken, MD
Conditions and Diseases
August 15, 2025

This past week, an unhinged man in Atlanta committed an atrocity. He went to the Centers for Disease Control (CDC) with five guns and killed a policeman. He blamed the COVID-19 vaccine for making him depressed and suicidal, and it is reported that he had been reaching out for mental health assistance for weeks.

Since January 2022, I have been interacting with national experts on a clinical problem that has hit …

Read more…

mRNA post vaccination syndrome: Is it real?

After serious self-reflection, is there redemption for Dr. Oz?

Harry Oken, MD
Physician
July 30, 2014

dr-oz-profile

Recently, Dr. Oz has come under scrutiny for his information on a number supplements that he alleges help with weight loss. Over the past 2 years, he has presented information about 3 diet supplements: green coffee extract, raspberry ketones and garcinia cambogia. After reviewing the available information, I can not agree that there is compelling scientific information to …

Read more…

After serious self-reflection, is there redemption for Dr. Oz?

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  • Most Popular

  • Past Week

    • Retirement isn’t the end of medicine, it’s a second act [PODCAST]

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      Vaishali Popat, MD, MPH | Physician
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