Side Effects in Individuals Vaccinated with mRNA COVID-19 Vaccines (Pfizer, Moderna) and Guidelines for Health Restoration

mRNA (messenger Ribonucleic Acid) vaccines are a new type of vaccine that do not use the live virus and do not cause actual infection. Instead, they use genetic material in the form of mRNA to instruct the body's cells to produce a specific protein found on the virus. In the case of the COVID-19 vaccine, it uses mRNA that replicates the genetic code specifically for the spike protein (Spike Protein), which is a key structure on the surface of the virus. Once injected, the cells temporarily produce harmless spike proteins so that the immune system recognizes them as foreign. This triggers the production of antibodies (Antibodies) and enhances T-cell activity to prepare the body to fight the actual virus in the event of future infection.

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

• Pfizer Vaccine developed by BioNTech/Pfizer, USA, with an overall efficacy of 95% in preventing symptomatic COVID-19 (after receiving 2 doses).
• Moderna Vaccine developed by Moderna, USA, with an overall efficacy of 94.1% in preventing symptomatic COVID-19 (after receiving 2 doses).

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

• Pain, swelling, or redness at the injection site
• Low to moderate fever, chills, or body aches
• Headache, fatigue
• Nausea, vomiting
• Muscle or joint pain

After receiving a COVID-19 or mRNA vaccine, you should monitor your body regularly and follow these recovery guidelines:

• Get sufficient rest, aiming for 6–8 hours of sleep per day so the body can fully restore itself.
• Eat a nutritious diet, focusing on foods that help reduce inflammation, such as fresh fruits and vegetables, fish, healthy fats, while reducing sugar and processed foods.
• Engage in light exercise to support health, such as slow walking, yoga, or stretching, to stimulate circulation.
• Consult a doctor if you experience any unusual symptoms you have not had before, such as palpitations, fatigue, or brain fog. You should see a physician for a thorough physical evaluation and appropriate treatment selection.
• Test your Spike Protein Antibody Level to evaluate whether the body still has immunity against the COVID-19 virus, particularly in those who were infected or vaccinated several months ago. This helps reduce risks from lingering Spike Protein in the body, which can damage vascular endothelial cells, increasing risks of cardiovascular diseases, acute and chronic inflammation, immune dysfunction, and Long Covid.
• Medical restoration therapies, such as personalized vitamin infusions tailored to your physical condition, IV Therapy to deliver essential nutrients directly into the body to boost immunity, reduce fatigue, and effectively combat inflammation, and EBOO Therapy (Extracorporeal Blood Oxygenation and Ozonation), which is a process of filtering blood and clearing toxins by drawing blood out to be cleansed through a sterile filter, then introducing low-concentration ozone into the blood before slowly and continuously returning it to the body. Through the circulatory system, the body benefits from both ozone and oxygen, helping reduce chronic inflammation and promoting vascular balance. This is suitable for those experiencing fatigue or feeling that their body has not been the same after COVID-19 vaccination. However, these restorative guidelines are merely options to help support internal body functions, not direct treatments or prevention for diseases, and should only be performed under the supervision of specialized physicians.