Answer: Although written records about medicinal plants dated back at least 5,000 years to the Sumerians, who described well-established medicinal uses for such plants as laurel, caraway, and thyme, archeological studies have shown that the practice of herbal medicine dates as far back as 60,000 years ago in Iraq and 8,000 years ago in China
La medicina tradicional occidental, de origen grecolatino, ha sido desplazada en sus conceptos teóricos por la inspirada biológicamente. La medicina egipcia era una medicina socialmente muy organizada, con profesionales y lugares específicos, pero siempre muy vinculada a la religión y al oficio sacerdotal
You would use "estar" in a sentence like, "voy a estar con mis amigos" which means "i am going to be with my friends". i don't see how you can use it in the examples you put.
