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Experts Explain Why a Headache Is Normal After the COVID-19 Vaccine and How to Get Relief 29 Shares Just received your COVID-19 vaccine and suddenly have a headache? That s normal and expected. The two COVID-19 vaccines that are currently FDA-approved (from Pfizer and Moderna) can cause mild viral-like side effects, including headaches, that typically resolve quickly within 24 to 48 hours of vaccination, said Michael S. Calderwood, MD, MPH, the chief quality officer and a staff physician in the Infectious Disease and International Health section of the Dartmouth-Hitchcock Medical Center. This is because vaccines are designed to trick your immune system into thinking that a virus is there when it s not. The purpose is to teach the immune system to battle the disease when it actually shows up, Amit Kumar, PhD, a researcher and scientist and the CEO of Anixa Biosciences, told POPSUGAR. It s kind of like a practice session or a drill, so when the actual disease agent (the SARS-Co

Anixa biosciencesAmit kumarMichaels calderwoodHitchcock medical centerInternational healthInfectious diseaseDartmouth hitchcock medicalShouldi do ifi haveHeadache after gettingஅமித் குமார்மைக்கேல்ஸ் கால்டர்வுட்ஹிட்ச்காக் மருத்துவ மையம்சர்வதேச ஆரோக்கியம்தொற்று நோய்டார்ட்மவுத் ஹிட்ச்காக் மருத்துவ