You should seek medical attention, if you experience a possible allergic reaction to the vaccine (e.g. eye or lip swelling, hives, generalised skin rashes, breathlessness).  Fever, chills, muscle pain, headaches, injection site pain are not allergic reactions.

You should discuss your suitability for subsequent COVID-19 vaccinations with your doctor. Persons with an allergic reaction assessed to be caused by the vaccine and who are advised by a doctor that they should not take subsequent doses of the vaccine, should adhere to the advice of the doctor.