Combining the denial of contagion with fleeing from the leper

Question:
And between two men, he said, may Allah's peace and blessings be upon him, "It is greater than its occurrence." Also, Sa'd said, "And what Allah wills, He does." What is it? Also, repeat the second narration so that it is between two men.

Answer:
There is no contradiction between them, because there is no contagion and no bad omen, as the people of the pre-Islamic age of ignorance (jahiliyyah) used to believe. This is because the disease spreads by itself, not by the divine decree and destiny (qada' wa qadar) of Allah.
As for fleeing from the leper, your fleeing from the lion, this indicates that contagion occurs by the permission of Allah and by His decree and destiny, and that mixing with those afflicted with chronic conditions is one of the causes of contagion by the permission of Allah, Mighty and Majestic. And staying away from them is engaging in the means and prevention; prevention is better than cure, as they say. And the Prophet, may Allah's peace and blessings be upon him, said: All of this is preventing contagion by the permission of Allah, Mighty and Majestic, and engaging in the means. So his saying: This is a denial of what the people of the pre-Islamic age of ignorance (jahiliyyah) used to believe, because the disease spreads by itself and by its nature, without the decree and destiny of Allah. But if one believes that the disease spreads by the permission of Allah and by His decree and destiny, and engages in the protective means, then there is no harm in that.