Organizations that sponsor expositions which offer health screenings and a wide variety of informational materials for participants. Health fairs are offered in many locations including parks, recreation centers, senior centers, schools and malls and offer stations for health history, height, weight, visual acuity, a blood profile and a general health review and referral as well as a variety of optional screenings which may include dermatology, hearing, podiatry, dental, glaucoma, allergy testing and the blood test for prostate cancer. Educational materials are usually available in a number of languages and may include information about AIDS/HIV, environmental health, prenatal care, heart disease and other community health topics. Some sites may also offer "Ask the Pharmacist" booths for information about medication.