Does believing that a person with a cold can infect others contradict the saying of the Prophet (peace and blessings be upon him): “There is no contagion”?

Question:
He says: Honorable Shaykh, may Allah grant you success, some people believe that diseases, such as a cold and the like, are transmitted from one person to another and cause contagion. Does this contradict the saying of the Prophet (peace and blessings be upon him): “There is no contagion”?

Answer:
It does not contradict it. Contagion exists, and disease is contagious. For this reason, the Prophet (peace and blessings be upon him) ordered that when the plague occurs in a land, one should not enter it, and whoever is in it should not leave it, in order to prevent contagion. Contagion exists, but what the Messenger (peace and blessings be upon him) forbade was believing that contagion happens by itself, as was the belief of the pre-Islamic age of ignorance. However, believing that it happens by the divine decree and destiny of Allah, while taking the means to prevent it, there is no blame in that. Yes.