Viral Infections in CFS/FMS and Long COVID: Part 1—Testing

Published: February 19, 2026
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Vitality101 Newsletter

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Hello Reader,

It is routine that the immune system goes into overdrive (though ineffectually) and then becomes exhausted in CFS, fibromyalgia, and Long COVID (CFS/FMS/LC). This results in many problems, including countless opportunistic infections. By definition, these are infections that do not survive when the immune system is healthy. So, reducing the load on the immune system and giving it added support is critically important.

It isn't necessary to track down and treat every infection. When the immune system is healed up, it knows how to do so itself. But some infections are helpful to treat, especially infectious organisms that are large, such as Candida and parasites. (I will discuss these in upcoming newsletters.)

In this article, I will discuss testing to look for viral infections. Especially important is Epstein-Barr Virus (EBV) Reactivation. Here is how I diagnose it.

Taking Vitamin D May Lower Heart Attack Risk

Woman Making Heart Sign

Simply taking vitamin D may be 40 times more effective at preventing heart attack deaths than cholesterol lowering medications—without the cost or toxicity!

In a study of 3,258 subjects (average age 62 years) suspected of having heart disease, those with low vitamin D levels had over twice the risk of dying from heart attack—or dying period—over a 7-8 year period that they followed. The study compared the 50% of subjects with the lowest levels of vitamin D to the 25% with the highest vitamin D levels.

Question to Dr. T on Emotional Issues from COVID

Q&A with Dr. T

Question:

I had COVID 5 years ago and have not been the same since. I developed severe mental and emotional symptoms—anxiety, fear, OCD, intrusive thoughts, crying spells. I also had low iron and Hashitmos for years prior to this but that was not treated properly.

Do you have a question for Dr. T? Visit Ask Dr. T at our website and send it to us (if a generally helpful question, we may ask for your permission to publish it here anonymously).

Dr. T’s Facebook Support Group — Now 1,300 Strong!

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People are already sharing experiences, learning together, and getting answers in our new Facebook Support Group—come join the conversation.

Featured This Week

Funny Mime

Funny Mime

Jacob Teitelbaum, MD

is one of the most frequently quoted post viral CFS, fibromyalgia, energy, sleep and pain medical authorities in the world. He is the author of 12 books including You Can Heal from Long Covid, the best-selling From Fatigued to Fantastic!, Pain Free 1-2-3, The Complete Guide to Beating Sugar Addiction, Real Cause Real Cure, The Fatigue and Fibromyalgia Solution, and the popular free Smart Phone app Cures A-Z. He is the lead author of eight research studies and three medical textbook chapters on effective treatment for fibromyalgia and chronic fatigue syndrome. Dr. Teitelbaum appears often as a guest on news and talk shows nationwide, including past appearances on Good Morning America, The Dr. Oz Show, Oprah & Friends, CNN, and FoxNewsHealth.

Websites: Vitality101.com | EndFatigue.com
Facebook Support Group: Recovering from Fibromyalgia, Chronic Fatigue, and Long COVID
Facebook Page | Instagram

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