The COVID-19 vaccine, whether it is AZ or Modena vaccine, is injected intramuscularly. Injecting the vaccine into the muscle layer can cause slow absorption by the body, forming a better immune response and better protection.
If you knead the injection site vigorously after injection, the vaccine will be quickly absorbed by the nearby capillaries, which may result in poor immune response and protection. In addition, the injection site is also a wound. It is recommended not to knead it to avoid more severe redness and swelling.
