Four [affairs] of Jāhiliyyah that the people will not leave: Wailing over the dead; reviling ancestors; tying rain to the rising or setting of stars, and contagion.

As for his saying: “There is no contagion”, then it is a prohibition from that anyone should say: “A thing passes [what it has] to another thing.”

In these reports is the prohibition of leaving the land of the plague [intending to] flee from it.

The germ theory which many people ascribe to the late 1800s and [to] Pasteur, actually goes way back to even Greek times you know sort of ancient Greek times.

The twins differing health patterns present a mystery. Why did one become ill with a childhood disease, like measles for example, while the other did not?

Some people have carried [the ḥadīth] to mean that [the prohibition] is due to fear for the healthy on account of the one with the disease...

Imām Aḥmad (along with Imām Mālik) was upon the view of negating contagion [as a matter of superstition] and eating with the sick (leper) with trust upon Allāh.

This is because [this reconciliation between the ḥadīths] negates contagion in principle, completely, as is stated explicitly in the authentic reports.

Imām al-Ṭahāwī [rh] addressed the issue of the apparent conflict between the various ḥadīths that have been connected to contagion.

Mention of a report in whose meaning some scholars have erred in and affirmed the contagion which the Prophet [sas] negated.