Is this just a seasonal illness, or could it be related to long COVID, post COVID or post-vaccine-syndrome?

26.12.2025

If recovery remains incomplete

For most people, COVID-19 initially presents as an acute infection followed by a full recovery. However, a growing number of those affected report symptoms that persist well beyond the acute phase. The most common long COVID symptoms include:

  • Fatigue after COVID
  • Brain fog after COVID
  • Heart palpitation after COVID
  • Chronic fatigue after COVID

These persistent symptoms are often described as long-term effects of COVID or late effects of COVID. If the symptoms persist for months, it is usually referred to as long COVID or post-COVID-syndrome.

Research into the causes of long COVID is complex. Current scientific approaches increasingly pointed to immunological dysregulation, endothelium dysfunction, and microcirculation disorders. Processes, that can impair the body`s ability to return to a stable state after infection.

Post COVID and post-vaccination-syndrome: Overlapping patterns

In addition to post-infectious symptoms, some people also report persistent symptoms after vaccination. These are often referred to as post-vaccination syndrome or post- vaccination symptoms and may include:

  • Symptoms after corona-vaccination
  • mRNA Vaccine-Side-Effects
  • Long-term effects after corona-vaccination
  • Coronavirus vaccine injuries

In many cases, the symptoms of post-COVID and post-vaccination conditions overlap, making it difficult to clearly distinguish between them. Researchers are therefore increasingly investigating tdhe immune response after vaccination and autoimmune reactions after COVID in order to understand why certain immune responses remain.

Treatment, therapy, and open questions

There is currently no standard treatment. Long COVID treatment and therapy are usually tailored to the individual and focus on symptom relief, pacing, and close monitoring.

One of the most common questions asked by those affected is: What helps with long COVID?

The answer depends on which systems are affected—such as the immune system, the nervous system, the vascular system, or the autonomic nervous system. This complexity is leading many doctors to rethink existing treatment approaches especially for post-COVID and post-vaccination patients..

For a deeper understanding

The anthology Long/Post COVID & mRNA Vaccine Side Effects helps readers, better understand
the medical, immunological, and systemic dimensions of long covid, post covid, mRNA Vaccine Side Effects and related medical conditions. This book brings together different perspectives and is aimed at both patients and medical professionals who are looking for a well-founded, evidence-based classification.

 https://www.sound-of-truth.com/de/shop/buecher/dirk-seeling/long-covid-modrna-impfnebenwirkungen/1/

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