The diseases of Egypt Such as the Egyptians were infected with, either commonly, or miraculously. It seems to refer not only to the plagues of Egypt, but to some other epidemic diseases, which they remembered to have prevailed among the Egyptians, and by which God had chastised them for their national sins. The leprosy, and other cutaneous distempers, were frequent in Egypt. The Scriptures also mention the botch of Egypt, as a disease common in that country, Deuteronomy 28:27. Diseases are God's servants, which go where he sends them, and do what he bids them.
Related Commentaries of Deuteronomy 7:15
Deuteronomy 7:15
15 And the LORD will take away from thee all sickness, and will put none of the evil diseases of Egypt, which thou knowest, upon thee; but will lay them upon all them that hate thee.