These physicians of the 19th and early 20th century were preceded by the action of the second Caliph of Islām, ʿUmar bin al-Khaṭṭāb (رضي الله عنه), over 1400 years ago based on the Prophetic teachings in this matter.
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https://abuiyaad.com/w/thomas-powell-contagion
Read more:
https://abuiyaad.com/w/thomas-powell-contagion