Quan sát dây leo trước khi chạm vào, quẹt vào hoặc đi qua. Cẩn thận ngay cả trong những tháng mùa đông.

Given the above summary, write a detailed text in English for it.
When growing as a vine, poison ivy can snake its way along trees. When it grows like this, it is tons of little poison ivy plants growing out of a vine. Always inspect a vine if you need to go near it, and see if it has plants growing out of it. Poison oak drops its leaves in winter, leaving a bare stem of a vine hanging down. But for sensitive individuals, this can still cause a rash.