COVID-19: coronavirus disease 2019; IgE: immunoglobulin E.
* The term "immunization stress-related responses" (ISRRs) was introduced during the COVID-19 pandemic to describe the symptoms that were repeatedly reported in response to the COVID-19 vaccines, but ISRRs are seen with other vaccines as well. In addition to the symptoms listed above, ISRRs can involve hypertension, vasovagal reactions leading to lightheadedness or syncope, dissociative neurologic symptoms, weakness, abnormal movements, or speech difficulties.