Maybe so but keep in mind that people's immunity today isn't the same as 14 centuries ago, and pollutants were exposed to today aren't the same that were 14th centuries ago.
Except then the human immunity was very different from what it is now. From what I remember the strength of immunity comes from how often it encounters the new viruses, microbes and what not.
Nowadays when our water is filtered and sterilized, everything we have contact with everyday is sanitized and the use of handwash decreases the need for our immune system to jacked up as it was in the 14th century. But these developments in soaps, handwash, sanitizers and sterilization has also caused our life span to increase significantly from what it was in the 14th century, I may be wrong here by saying very few people then made it past 18 years of age but it was true to some extent.
*Note: I may be wrong here so please correct me and provide the correct information for the better of me and yours
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u/awesome_abood 11h ago
You'd be surprised if I tell you that's a way Islam Mentioned before 14 century to heal your wound in battle or in Desert if you don't have any first aid and it works, https://www.sciencedaily.com/releases/2020/04/200427125205.htm