*Re-upload of slides originally posted 16th April 2019.* Note: Uploading to SlideShare causes disruption to slide layout. Original layout visible on download. Case presentation of a patient (anonymised) seen in outpatient clinic during course of medical school studies. NOTE: Slide 7 references the patient never having had a flu vaccination due to their egg allergy. Although trivalent influenza vaccinations are grown in embryonated hens' eggs, other preparations (such as the Influenza A-specific flu vaccine) are grown in mammalian cells and are therefore safe for patients with egg allergy. Sources for all imagery and sources listed in references section where possible. I do not claim ownership of any images or graphics. Slides for educational purposes only, and should not replace clinical judgement. No monetary gain was made for this work.