Hypersensitivity

Jade, 20 years-old, has had episodes of paroxysmal dyspnea since the age of 12, especially at night, associated with coughing and chest tightness, sometimes with wheezing. For 1 year now, attacks have been more frequent, almost daily, also occurring during the day.

A 19 month old infant presents with marked leg swelling, pain and inability to walk within 6 hours of receiving booster vaccinations. The child had been ambulatory for the prior 6 months and was now no longer able to walk

A 31 year old caucasian male presented to the HIV clinic complaining of recent onset of fever, vomiting, joint pain, muscle aches, sore throat and a fine red rash on his face and arms. All symptoms had worsened since they first started 2 days ago and seemed to be aggravated shortly...