The Prophet (ﷺ) said, "Plague is the cause of martyrdom of every Muslim (who dies because of it).
Sahih al-Bukhari Book 56, Hadith 46
← Previous Hadith Allah's Messenger (ﷺ) said, "Five are regarded as martyrs: They are those who die because of plague, Abdominal disease, drowning or a falling building etc., and the martyrs in Allah's Cause."

Sahih al-Bukhari Book 56, Hadith 45 Next Hadith → When the Divine Inspiration: "Those of the believers who sit (at home), was revealed the Prophet (ﷺ) sent for Zaid (bin Thabit) who came with a shoulder-blade and wrote on it. Ibn Um-Maktum complained about his blindness and on that the following revelation came: "Not equal are those believers who sit (at home) except those who are disabled (by injury, or are blind or lame etc.) and those who strive hard and fight in the Way of Allah with their wealth and lives)." (4.95)

Sahih al-Bukhari Book 56, Hadith 47