Understanding Long Covid – Symptoms, Cause
What is Long Covid?
Long Covid refers to symptoms that persist or appear after a coronavirus infection. Typically, the symptoms last for more than four weeks after the acute infection. The symptoms can vary considerably. Those affected often report persistent fatigue, difficulty concentrating ("brain fog"), shortness of breath, circulatory problems, pain, or sleep disturbances. In some people, the symptoms disappear after a while, while in others they can persist longer. Long Covid affects several bodily systems simultaneously, including the nervous system, the immune system, and energy metabolism. Therefore, experts often refer to it as a multisystemic illness. It is also important to distinguish between the two terms: Long Covid is generally diagnosed when symptoms persist for more than four weeks after infection. If the symptoms last for more than three months, the term Post-Covid Syndrome is often used. In some cases, the symptoms may also meet the criteria of an illness such as ME/CFS, especially if there is a stress-related worsening of symptoms.
What are typical symptoms of Long Covid?
The most common symptoms include: severe physical and mental exhaustion, post-exertional malaise (worsening after exertion), and difficulty concentrating ("brain fog"). Unrestorative sleep Circulatory problems upon waking Muscle and joint pain Increased sensitivity to light or noise The severity can vary greatly from person to person.
Is there a medication for long-term Covid treatment?
That sounds plausible at first – but a study paints a much more nuanced picture. A research team at Charité Hospital examined this very issue back in 2025. What was investigated? Does the spike protein remain in the body after a COVID infection? – And if so, does it cause illness? The study included: People with long-term COVID People with ME/CFS and recovered individuals without symptoms The results: Yes – the spike protein is still detectable in some people, sometimes months or even years after the infection. However: This study showed no correlation with symptom severity. People with spike protein were not sicker than others. No greater fatigue No more frequent or severe crashes No more symptoms overall Inflammatory or coagulation markers were also not related. And equally interesting: The time since the infection was irrelevant. What does this mean? This study reveals something important: Not everything that is measurable is automatically directly related to symptoms. Just because something is detectable doesn't automatically mean it causes illness. Why this is important Many sufferers understandably search for a single cause. But current findings suggest that: The processes involved in Long COVID and ME/CFS are more complex and affect: the nervous system the immune system energy production and overall bodily regulation Our perspective Approaches that aim to "eliminate" the spike protein often fall short. The crucial factor is not primarily removing individual components, but rather supporting the body's regulatory processes – because once the body recovers from its state of alarm, it can usually process such residues itself. That's precisely why, at the Safety Retreat, we don't focus on individual causes, but on understanding the connections. What is really happening in the body? Why does the system remain in a state of alarm? And how can one gradually regain greater stability? Link to the study Journal of Clinical Medicine - Serum Spike Protein Persistence Post COVID Is Not Associated with ME/CFS https://www.mdpi.com/2077-0383/14/4/1086
What are possible biological connections?
Long Covid-19 – ME/CFS is now understood as a multisystem disease. Research is investigating, among other things, changes in: the regulation of the nervous system, the function of the immune system, energy production in cells, and communication between different body systems. These complex interrelationships are the subject of current scientific research.
How is Long Covid diagnosed?
There is currently no single test that can definitively diagnose Long Covid. The diagnosis is therefore primarily based on the patient's medical history, typical symptoms, and a physical examination. The connection to a previous Covid-19 infection is crucial. If symptoms appear after an infection or persist for an extended period, Long Covid may be suspected. Doctors typically conduct various examinations, such as blood tests, and assessments of the heart, lungs, or circulatory system, to rule out other possible causes of the symptoms. Only when other illnesses cannot explain the symptoms can a diagnosis of Long Covid be made. If symptoms persist for more than four weeks, it is often referred to as Long Covid. If symptoms last for more than three months and cannot be explained by other illnesses, it is usually called Post-Covid Syndrome. Because Long Covid can affect different bodily systems, diagnosis is often interdisciplinary, involving various medical specialties.
What is pacing?
Pacing is an energy management strategy for illnesses such as ME/CFS or Long Covid. It teaches those affected to consciously allocate their available energy and manage physical, mental, and emotional stress in such a way as to avoid overload. The goal is to stay within one's own limits and prevent so-called "crashes" or worsening of symptoms as much as possible.
Is Long Covid a mental illness?
No. Long Covid - ME/CFS is a physical, multisystemic illness. This means that several bodily systems are affected simultaneously – including the nervous system, the immune system, energy metabolism, and often the cardiovascular system. The fact that the illness was sometimes previously classified as psychological is primarily due to the fact that many of the biological mechanisms were not sufficiently understood for a long time. Numerous scientific studies now show that measurable changes occur in various bodily systems in ME/CFS. Therefore, ME/CFS is not a mental illness, but a complex physical illness involving multiple biological systems.
Is it possible to recover from a long-term Covid diagnosis?
The course of Long Covid can vary greatly. Some people experience significant improvements in their resilience over time, while in others the illness persists longer or progresses in phases. Scientific literature and personal accounts from those affected contain stories of recovery and significant improvement. At the same time, there is currently no therapy that reliably leads to a cure for everyone. Therefore, Long Covid and ME/CFS are currently considered complex illnesses whose course can vary considerably from person to person. Many sufferers report, however, that a better understanding of the illness, adapted energy management, and a gradual stabilization of the body can help improve resilience. Even though the process often takes time and unfolds differently for each individual, many experiences show that the body can change and adaptation processes are possible. Hope and realistic support are therefore important factors on the path to stabilization.
Is Long Covid an autoimmune disease?
Long Covid is not currently classified as a classic autoimmune disease. Rather, it is a multisystemic physical illness involving several areas of the body – including the nervous system, the immune system, energy metabolism, and often the cardiovascular system. Some studies have found autoantibodies in a subset of affected individuals, for example, against certain receptors of the nervous system. This has led some researchers to discuss whether autoimmune-like mechanisms might play a role. To date, however, there is no unified scientific classification that definitively defines Long Covid as an autoimmune disease.
Can Long Covid be detected in the blood?
Currently, there is no single blood test that can definitively diagnose Long Covid. The diagnosis is therefore primarily based on typical symptoms and international diagnostic criteria, such as the Canadian Consensus Criteria (CCC) or the International Consensus Criteria (ICC). Blood tests nevertheless play an important role. They are mainly used to rule out other conditions that can cause similar symptoms, such as thyroid disorders, inflammation, nutritional deficiencies, or other internal medical conditions. Research is increasingly investigating biological changes in ME/CFS, for example, in the immune system, energy metabolism, or certain neurotransmitters. These findings indicate that measurable physiological changes can occur in Long Covid. However, there is currently no standardized laboratory test that is routinely used for diagnosis.
Is there a medication for long-term Covid treatment?
Currently, there is no approved medication that can specifically cure Long COVID or eliminate the cause of the disease. Treatment therefore focuses primarily on alleviating symptoms and better stabilizing daily life.
Is there a medication for long-term Covid treatment?
Many people with Long Covid or ME/CFS are asking themselves a central question: Why does the body remain in a state of emergency? A new exploratory study provides important insights into this. The study was conducted in collaboration with an interdisciplinary consortium, including Leiden University Medical Center, as well as physicians, researchers, and patient initiatives. What was the study about? In the so-called "mind-body" study, 18 affected individuals were interviewed who reported having recovered significantly from Long Covid. What they had in common was that they attributed their improvement to approaches that consider the connection between the brain, nervous system, and body. Many participants experienced significant limitations in their daily lives. • Some were bedridden for weeks or even months. Some were trapped between bed and sofa for months. Simple tasks like cooking, climbing stairs, or holding conversations were temporarily impossible. What the researchers observed: Despite very different life stories, a surprisingly similar pattern emerged: Many affected individuals experienced a crucial shift in perspective – from: “My body is permanently damaged” to: “My nervous system is out of balance.” This shift was described by many as a turning point – with more hope and motivation to actively change something. How did the improvement unfold? The study does not present a “miracle cure” model. Rather, it reveals a process: • Small steps • Repeated practice • Setbacks and adjustments • Increasing understanding of one's own body Improvement often occurred over time – not linearly. What approaches were used? Frequently described were: • Understanding the connections • Targeted calming of the nervous system • Re-evaluation of symptoms • Cautious, gradual activity • Reflection on one's own stress patterns The goal was to restore a greater sense of security to the body. Important context This study is: • qualitative (interviews, not a controlled study) • does not provide evidence for cause or therapy However, it reveals something crucial: There are recurring patterns in how people experience improvement. Why this is relevant The results align with a growing understanding: That chronic symptoms are not solely attributable to a single cause, but rather to an interplay of: • body • nervous system • stress and protective mechanisms/cell danger response What does this mean for those affected? For many, it can be helpful to: • better understand their own body • more effectively manage stress • build stability step by step without pressure, without an "all or nothing" approach Our Approach This is precisely where our Safety Retreat Online Program comes in: We combine medical knowledge and understanding with a structured approach to implementation that considers the nervous system, the cell danger response, energy, and everyday life. Link to the study https://www.medrxiv.org/content/10.64898/2026.02.21.26345052v1?utm_source=chatgpt.com