Why does COVID-19 booster injection cause arm soreness after vaccination? Does it affect the delay of the second injection of COVID-19 vaccine

Why is the arm sore after COVID-19 vaccine

If the arm is sore and swollen after COVID-19 vaccine injection. This is an adverse reaction that occurs after vaccination, and mild cases generally disappear within 72 hours. If the persistent pain symptoms do not disappear, the method of applying hot compress or hand massage locally can be used for several days, and the symptoms can disappear. It may be caused by local stimulation, and it is also related to your sensitivity and excessive attention. Generally, it is not caused by any special disease. It is good to pay attention to self observation. Check whether there is redness and swelling at the injection site of COVID-19 vaccine. Relax and don't worry too much. You can go to the hospital for examination and consultation, so you can rest assured.

Does the delay of the second injection of COVID-19 vaccine have an impact?

It may have some impact.

At present, the COVID-19 vaccine is the inactivated COVID-19 vaccine, which needs to be inoculated with 2 doses in total. After the first dose is inoculated, the second dose should be injected at an interval of more than 3 weeks, and the two doses should be completed within 8 weeks. If the immunization schedule is changed arbitrarily, it may affect the duration and effectiveness of the vaccine, so it is recommended to administer it within the prescribed time. If there has been a delay, it is recommended to administer the corresponding dose as soon as possible, without the need to start from scratch.