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Side effects and symptoms caused by the vaccine include redness and swelling at the injection site, stiffness and soreness in the muscle, tenderness and swelling of the local lymph nodes and, if the vaccine is potent enough, even fever.
Some scientists claim these side effects are due to the balance of vaccine design which is maximising protection and benefits while minimising the uncomfortable, however necessary side effects.
Two of the most discussed serious side effects, anaphylaxis (a severe allergic reaction) and Guillain-Barre Syndrome (nerve damage due to inflammation), occur at a frequency of less than one in 500,000 doses.
Vaccine side effects: Fever and headaches are the common symptoms reported (Image: Getty Images)