Side Effects in People Who Have Received mRNA COVID-19 Vaccines (Pfizer, Moderna) and Health Recovery Approaches

An mRNA vaccine (messenger Ribonucleic Acid) is a newer type of vaccine that does not use the whole virus and does not cause an actual infection. Instead, it uses mRNA genetic material to instruct the body’s cells to produce a specific part of the virus. In the case of COVID-19 vaccines, the mRNA carries a replicated genetic code for a specific part of the Spike Protein, an important structure on the virus’s surface. After vaccination, the cells temporarily produce a harmless Spike Protein so that the immune system can learn to recognize it as a foreign substance. This stimulates antibody production and increases T-cell activity, preparing the body to fight the virus if an actual infection occurs in the future.

Currently, two mRNA vaccine brands have been approved and are widely used in many countries, including Thailand:

• Pfizer vaccine, manufactured by BioNTech/Pfizer in the United States, has an overall efficacy of 95% in preventing symptomatic COVID-19 after completion of two doses.
• Moderna vaccine, manufactured by Moderna in the United States, has an overall efficacy of 94.1% in preventing symptomatic COVID-19 after completion of two doses.

Side effects of mRNA COVID-19 vaccines Pfizer and Moderna and health recovery approaches

After receiving an mRNA COVID-19 vaccine, some side effects may occur. Most are temporary and resolve on their own within 2–3 days after vaccination. Common symptoms include:

• Pain, swelling, or redness at the injection site.
• A mild to moderate fever, chills, or general body aches.
• Headache and fatigue.
• Nausea and vomiting.
• Muscle or joint pain.

After receiving a COVID-19 or mRNA vaccine, regularly observe your physical condition and consider the following health recovery approaches:

• Get adequate rest. Aim for 6–8 hours of sleep per day so the body can recover fully.
• Eat nutritious foods, with an emphasis on foods that may help address inflammation, such as fresh fruits and vegetables, fish, and healthy fats. Reduce sugar and processed foods.
• Perform light exercise to support health, such as slow walking, yoga, or stretching, to stimulate circulation.
• Consult a physician if you experience unusual symptoms that you have never had before, such as palpitations, becoming tired easily, or brain fog. A physician should perform a detailed assessment and select an appropriate treatment approach.
• Check the Spike Protein Antibody Level to assess whether the body still has immunity against the COVID-19 virus, particularly in people who were infected or vaccinated several months ago. This is intended to reduce the risk associated with residual Spike Protein in the body, which may damage vascular endothelial cells and increase the risk of cardiovascular disease, acute and chronic inflammation, immune-system dysfunction, and Long Covid.
• Consider medically supervised recovery approaches, such as supplements or vitamin formulations selected specifically for the individual’s physical condition; IV Therapy to deliver essential nutrients directly into the body, support immunity, reduce fatigue, and address inflammation; and EBOO Therapy (Extracorporeal Blood Oxygenation and Ozonation), a blood-filtration and residual-toxin-cleansing process. During EBOO Therapy, blood is drawn from the body and cleaned through a sterile filter. Low-concentration ozone is then added before the blood is slowly and continuously returned to the body. The circulatory system receives benefits from both ozone and oxygen, which may help reduce chronic inflammation and support vascular-system balance. It may be suitable for people experiencing fatigue or feeling that their body has not been the same since COVID-19 vaccination. However, these recovery approaches are only options intended to support the body’s internal systems. They do not directly treat or prevent disease and must be provided only under the supervision of an experienced physician.