In this answer on Movies SE, there is a quote :
I underwent the usual mutation there, through the Trial of Grasses, and then hormones, herbs, viral infections. And then through them all again. And again, to the bitter end. Apparently, I took the changes unusually well; I was only ill briefly. I was considered to be an exceptionally resilient brat…and was chosen for more complicated experiments as a result. They were worse. Much worse. But, as you see, I survived. The only one to live out of all those chosen for further trials. My hair's been white ever since. Total loss of pigmentation. A side effect, as they say. A trifle.
- The Last Wish (The Voice of Reason 4)
I don’t know Witcher universe much, and never read any books (only briefly played some games), though in my understanding they are in high fantasy genre, so roughly medieval. And the highlighted words sound surprisingly modern. Especially “hormones” and “viral” suggest their medical science is close to modern level of development. It suggests they know about endocrine system, and can distinguish viruses and other pathogens.
Are similarly modern words used in Polish original, or is it a mistranslation? And are these terms used consistently throughout the books, or only in this particular book?
More generally, how close to modern level are biological and medical sciences in the Witcher universe?