While rare, inflammatory syndromes after vaccination (like Multisystem Inflammatory Syndrome - MIS) involve severe, widespread inflammation, with symptoms including high fever, severe abdominal pain, persistent vomiting/diarrhea, rash, red eyes, swollen hands/feet, fatigue, and sometimes heart issues (chest pain, rapid heartbeat), requiring urgent medical attention as it affects multiple organs and can cause shock, though MIS is more commonly linked to the COVID-19 infection itself than the vaccine.
Extensive studies conducted in the U.S. and other countries found only a few serious ones. For example, the new vaccines can cause myocarditis (inflammation of the heart muscle) in a small fraction of young men, and one study reported seven severe cases of shingles for every million shots administered.
Soreness or swelling where the shot was given, fever, fussiness, feeling tired, loss of appetite, and vomiting sometimes happen after DTaP vaccination. More serious reactions, such as seizures, non-stop crying for 3 hours or more, or high fever (over 105°F) after DTaP vaccination happen much less often.
The terminology 'post-acute covid-19 vaccination syndrome' (PACVS) refers to a different clinical presentation than PCVS, and refers to lingering symptoms which last typically longer than one month and may last for years [5].
Since vaccines don't drive the immune response nearly as vigorously as natural infections do, it is less likely that they would induce autoimmunity. However, scientists continue to study questions related to vaccines as a cause of autoimmunity as they arise.
Many types of autoimmune diseases cause redness, swelling, heat, and pain, which are the signs and symptoms of inflammation. But other illnesses can cause the same symptoms. The symptoms of autoimmune diseases can come and go. During a flare-up, your symptoms may get severe for a while.
Guillain-Barré syndrome (GBS) is a rare disorder in which a person's own immune system damages their nerve cells, causing muscle weakness and sometimes paralysis. GBS can cause symptoms that usually last for a few weeks. Most people recover fully from GBS, but some people have long-term nerve damage.
The analyses of all GBS cases based on claims data suggest an increased risk of GBS during the 42 days following vaccination, with an estimated 9 excess cases of GBS per million doses of Abrysvo, and an estimated 7 excess cases of GBS per million doses of Arexvy administered to individuals 65 years of age and older.
PASC is characterized by a variety of long-lasting symptoms, with the most common being shortness of breath, headache, fatigue, cognitive dysfunction (memory impairment and lack of concentration), anxiety, myalgia, joint pain, smell and taste dysfunction, cough, insomnia, rhinorrhea (Lopez-Leon et al., 2021).
Use an ice pack or cool, damp cloth to help reduce redness, soreness and/or swelling at the place where the shot was given. A cool bath can also be soothing. Drink liquids often for 1-2 days after getting the vaccine. Take an over the counter pain reliever unless you have any specific contraindication.
Measles, Mumps, and Rubella (MMR) Vaccine
While rare, the MMR vaccine has been associated with adverse events such as seizures caused by fever (febrile seizures) in young children and, in extremely rare cases, allergic reactions or encephalopathy.
The "3-2-1 rule" in veterinary medicine refers to monitoring post-vaccination lumps in cats for potential Feline Injection-Site Sarcomas (FISS): a lump needs investigation (biopsy/removal) if it's still there 3 months after vaccination, is bigger than 2 cm (about 1 inch), or is growing larger 1 month after appearing. This guideline helps differentiate normal inflammatory reactions from cancerous growths that can rarely form at injection sites, according to the American Animal Hospital Association (AAHA) and Veterinary Partner.
Call Your Doctor If:
Redness becomes larger than 2 inches (5 cm) Redness becomes more painful after 3 days. Fever starts after 2 days (or lasts more than 3 days) Redness or pain lasts more than 7 days.
Ice. Icing in short intervals throughout the day can help reduce swelling, which will reduce soreness. Over-the-counter medication. Acetaminophen or Ibuprofen after your shot can help reduce inflammation and soreness.
Common causes include:
Myocarditis usually lasts less than a month. It often resolves itself or goes away quickly with treatment. Recovery time can last weeks or months after treatment, and doctors may recommend to avoid strenuous exercise and activity to give the heart tissue time to heal.
Typically spike protein can be detected for a few days after vaccination, but some participants with PVS had detectable levels more than 700 days after their last vaccination. Persistent spike protein has been associated with long COVID as well.
Curcumin had been consistently reported as the therapeutic agent against SARS-CoV-2 through blocking Spike protein. We earlier reported curcumin as the potential agent against SARS-CoV-2 S proteins, both Native and mutated [11].
What are the most common symptoms of long COVID?
Guillain-Barre (gee-YAH-buh-RAY) syndrome is a condition in which the body's immune system attacks the nerves. It can cause weakness, numbness or paralysis. Weakness and tingling in the hands and feet are usually the first symptoms. These sensations can quickly spread and may lead to paralysis.
However, growing evidence suggests that COVID-19 vaccination may cause new-onset autoimmune diseases, including autoimmune glomerulonephritis, autoimmune rheumatic diseases, and autoimmune hepatitis.
Recent CDC studies based on data from the Vaccine Safety Datalink (VSD) and the Vaccine Adverse Event Reporting System (VAERS) have found evidence suggesting an increased risk of GBS among adults 18 years and older after J&J/Janssen COVID-19 vaccination but not after Pfizer-BioNTech or Moderna COVID-19 vaccination.
Vaccines, including influenza virus vaccine, induce relatively mild and transient inflammatory responses [8–10]. In turn, inflammation is implicated in pain, malaise, fatigue, and general sickness behaviors [11]. Thus, transient inflammatory responses may correspond with subjective symptom reporting.
The "worst" autoimmune diseases are subjective but often ranked by severity, impact on life expectancy, and organ damage, with top contenders including Giant Cell Myocarditis (deadly heart inflammation), Vasculitis (blood vessel inflammation like GPA), Systemic Lupus Erythematosus (multi-organ attacks), Multiple Sclerosis (nervous system damage), and Type 1 Diabetes (pancreas destruction). These conditions can severely affect quality of life, cause permanent disability, and reduce lifespan if not managed effectively, though rare ones like Giant Cell Myocarditis are acutely fatal.
COVID infection has been linked to higher risk of autoimmune disorders, including rheumatoid arthritis and type 1 diabetes.