Before I had my daughter I was never sick, thought my immune system was strong. Then she started school and I got sick every freaking time she got a little bit sick. Turns out my immune system is crap, I just wasn’t in contact with sicknesses that much.
Can confirm for Switzerland. It’ll probably be some crappy tea bag quality, like lipton yellow or Twinings. They’ll also probably charge you 4-6 CHF (about the same in USD) for it.