ALLERGY
In an allergic response, the immune system misidentifies a substance as harmful, triggering an adverse reaction.
A 41-year-old man presents to a dermatology clinic with a three-day history of pruritic lesions...
Rashes are ubiquitous in the American population, being one of the more common reasons for pharmacy and physician visits.
Vaccines are medical miracles, saving more lives and preventing more deaths than any other medical advance in the last century.
In the United States, the most common infectious cause of death is pneumonia.
Allergic diseases are important causes of morbidity in the United States.
Hives are the common term for a skin condition known as urticaria. These red, swollen, and itchy welts appear suddenly on the skin’s surface in reaction to the systemic or topical stimulation of the immune system.
Data from the 2000 to 2003 National Health Interview Surveys show that 23.2% of the adults 55 and older were in fair or poor health.