During the middle ages, the most common people who want to receive treatment will likely go to people who has knowledge about medical treatments and to those people who have undergone practical experience with the said illness or certain medical condition.
Answer:
Sorry, I don't think you finishes typing your question
If this is just a general question, one example you could use would be Earth systems. You could use Earth's interior powers and volcanic eruptions. The heat from Earth's internal processes cause volcanic eruptions.
(Ik this is really random but i just did science he lol, i doubt i actually helped because i wasn't really sure of the question but i tried haha)
Answer:
Herd immunity occurs when a large portion of a community (the herd) becomes immune to a disease, making disease transmission unlikely from person to person. As a result, the entire community — not just those who are immune — is protected.
Explanation:
Hope this helped <3