COVID Fallout Resources
Understanding Long COVID and the COVID Fallout
Free education from Dr. Margaret Christensen, MD and Dr. Gail Clayton, DCN
Many people have not felt like themselves since COVID-19. Ongoing fatigue, brain fog, sleep and mood changes, shifts in hormones and menstrual cycles, and new sensitivities can be confusing and isolating. This free resource center offers clear, carefully written education about Long COVID: what researchers have established, what is still being studied, and practical ways to support your recovery.
What We Know So Far
Long COVID: What Is Established and What Is Still Being Studied
Long COVID research is moving quickly. To help you read with confidence, we separate findings that are widely accepted from ideas that are promising but not yet proven.
Well established
- Long COVID is a recognized, infection-associated chronic condition. The U.S. National Academies define it as a condition present for at least three months after SARS-CoV-2 infection that affects one or more body systems.
- It can follow mild as well as severe infections, and it can affect both adults and children.
- Commonly reported symptoms include fatigue, post-exertional malaise (symptoms that worsen after physical or mental effort), brain fog, shortness of breath, heart-rate changes, sleep problems, and changes in smell or taste.
- Symptoms may be constant, come and go, or worsen over time, and there is no single test that diagnoses Long COVID.
Emerging and under investigation
- Researchers are studying several possible drivers, including lingering viral material, immune dysregulation, autoimmunity, reactivation of dormant viruses such as Epstein-Barr virus, small blood-clotting changes, and shifts in the gut microbiome. These may differ from person to person.
- Some clinicians, including our educators, see overlap between Long COVID and illness linked to mold and other biotoxins, such as mast cell activation and immune imbalance. This is a clinical observation and an area of active interest, not an established finding.
- Some people report persistent symptoms after COVID-19 vaccination. Researchers have begun studying these reports, and much is still unknown.
Throughout this resource center, we note when a topic reflects established research and when it reflects emerging ideas or clinical experience.
Featured Video
An Introduction from Dr. Margaret Christensen
A short welcome to the COVID Fallout Resources and what you will find here.
Video coming soon
Free Download
Free COVID Fallout Introductory Guide — Coming Soon
A free 30-page introduction to Dr. Margaret Christensen's work on the COVID fallout: a clear starting point for understanding what so many people have experienced since the pandemic.
Want the full picture? The complete 150-page e-guide, Hormonal Havoc: The COVID Fallout and How to Fix It, is available for $17.
Article Library
Your Long COVID Questions, Answered
We are writing a series of patient-friendly articles based on the questions asked most often during our COVID Fallout follow-up Q&A webinars. Articles will be added here by topic as they are completed.
Spike Protein, Vaccine Injury & Neutralization Protocols
- Understanding COVID Vaccine Injury and "Spikeopathy": What Causes Internal Vibrations, Micro-Clots, and Neuropathy?
- How Long Does the COVID Spike Protein Stay in Your Body—and How Do You Detox It?
- Nattokinase, Serrapeptase, and Bromelain: Which Fibrinolytic Enzyme Breaks Down Spike Protein Best?
- Shedding and Environmental Spike Exposure: How Unvaccinated Individuals Can Protect Their Immune System
Brain Fog, POTS & Nervous System Recovery
- Why Long COVID Causes Severe Brain Fog: Microglial Activation and Brain Inflammation Solutions
- Taming POTS, Dysautonomia, and Internal Vibrations After COVID: Restoring Autonomic Regulation
- Calming the Vagus Nerve and Limbic System: Neuroplasticity Programs and Nervous System Reset
- Loss of Smell, Tinnitus, and Receptor Blockade: The Nicotine Patch Protocol and Neuro-Sensory Recovery
Mast Cell Activation (MCAS), Histamine & Co-Infections
- Is It Long COVID or MCAS? Taming Histamine Flushing, Hives, and Sudden Food Intolerances
- Reactivated EBV, HHV-6, and Viral Persistence: How Latent Infections Block Long COVID Recovery
- Mold Toxicity, CIRS, and COVID Fallout: Overcoming the Hidden Double Whammy
- Parasite Cleansing and Gut Dysbiosis: Clearing Microbes and Restoring Mucosal Barrier Health
Hormones, Gut Restoration & Targeted Functional Therapies
- COVID Hormonal Fallout: Addressing Thyroid Crash, Adrenal Exhaustion, and Early Menopause
- Niacinamide (Vitamin B3) and NAD+ Depletion: The Essential Nutrient for Cellular Energy and Fatigue
- Low-Dose Naltrexone (LDN), Peptides, and Glutathione: Advanced Functional Protocols Without Triggering Flares
- Microclots, Endothelialitis, and Capillary Health: Protecting Your Blood Vessels and Organs After COVID
Keep Learning
Related Resources
Education, courses, and community support from Drs. Christensen and Clayton.
Mold & Biotoxin Illness Learning Center
Thirty-two free articles on mold illness, mast cells and histamine, detoxification, gut health, and immune balance.
How Mold and Mycotoxins Disrupt Immune Balance
A Learning Center article on immune imbalance, a theme that also comes up often in Long COVID research.
Educational Courses
Self-paced courses, including Mold, Mast Cells, & Autoimmunity and Mold Detox Diet, for deeper, structured learning.
Enrollment Opening Soon
Mentored Healing
An education and support community from Dr. Gail Clayton and Dr. Margaret Christensen. Join the waitlist to hear when enrollment opens.
The information in this resource center is for educational purposes only and is not intended as medical advice. Long COVID research is evolving. Please consult a qualified healthcare provider about your individual situation.