Contagious Diseases

The notion that diseases are contagious is a result of our worship of the means. No matter what present day research may say, the
research of the Sharī‛at is that the One who caused the first person to fall ill has caused the second one to fall ill as well. It is possible that others in the same house may also succumb to that illness. However, if our gaze is on the Absolute Power, then is it not better to attribute that illness to divine will than to the means? Is the will of Allāh ta‛ālā not even equal to the effect of means? We seek refuge in Allāh ta‛ālā.
The fact of the matter is that every person who is weak in his faith will rationalize his worship of the means by saying: “I do not deny the power of Allāh ta‛ālā but it is His norm that when a contagious disease enters a house, it is also passed on to others in that house.” The tauhīd of a Muslim demands that he attributes every single thing to the will of Allāh ta‛ālā. When this is realized, the means will become inconsequential in his sight. And if he has been blessed with full confidence in Allāh ta‛ālā, then the mysteries behind the effects of the means will be fully exposed to him.
Hadrat Maulānā Badr ‛Ālam rahimahullāh As quoted from Aqwāl-e-Salaf, vol. 9, pp. 605-606.


Q. Why did our Nabi (Sallallahu alayhi wasallam) say that one should flee from the leper? Does this not indicate that disease is contagious?
A. You may pose this question to Rasulullah (Sallallahu alayhi wasallam) on the Day of Qiyaamah if you are afforded an opportunity of meeting him. Why are you stupidly seeking to cancel Rasulullah’s explicit La Adwaa (Disease is not contagious) declaration with the leper Hadith? Why are you casting a blind eye in this direction? Only nifaaq or kufr or extreme deficiency of Imaan constrains a person to abrogate the Ahkaam of the Shariah by means of creating satanic contradictions. Regardless of the reason for fleeing from a leper, the irrefutable fact is that Rasulullah (Sallallahu alayhi wasallam) said: “La Adwaa”. This suffices for a Mu’min, not for a munaafiq. If someone decides to flee from a leper, he may do so, but he may not utilize the narration
to deny the immutable Truth of the statement made by our Nabi (Sallallahu alayhi wasallam) regarding his negation of the kufr idea of contagion which was the belief of the mushrikeen, and which is still the idea of the atheists of this era. Rasulullah (sallallahu alayhi wasallam) advised fleeing from a leper because of Imaani
weakness of people such as you. The fleeing is not for those whose Imaan is sound. While people cite this narration to bolster the ideas of the atheists, they conveniently ‘forget’ that Rasulullah (Sallallahu alayhi wasallam) ate together with a leper from the same bowl. He said to the leper: “Eat and have tawakkul on Allah.” They will not mention that the lepers were not banned from the Musjid nor were they quarantined,
etc. A person who cites this or similar narrations to bolster the kuffaar theory and to scuttle the negation of contagion by Rasulullah (Sallallahu alayhi wasallam) do so at the peril of losing their Imaan.