[Przystanek Woodstock 2009 and 2010--danger to life and health and medical security of mass event].

Przystanek Woodstock Festival is one of the biggest polish music festivals, which gathers nearly half million participants each year. The aim of the article was presentation of number and type of the medical cases and the medical interventions in the main field hospital - OAZA. The second aim was assessment of medical cover of XV and XVI Przystanek Woodstock Festival.
The book with description of medical interventions and plan of medical cover prepared for the festival were retrospectively analyzed.
The medical staff has given medical aid to 1433 patients in 2009 and to 1414 in the next year. The main reason of medical interventions were: injuries, allergic reactions after insect bite, foreign bodies in the saccus conjunctivalis, gastro-intestinal disorders, pain ailments (among other things: headache, back pain).
The organization of the Przystanek Woodstock Festival is tied with appearing of peculiar health threats and the early diagnosis of them is essential for correct protecting this mass events. Medical security turned out to be sufficient in relation to predicted threats.