John Gill Commentary Deuteronomy 28:60

"And he will bring upon thee again all the diseases of Egypt, which thou wast afraid of; and they shall cleave unto thee." — Deuteronomy 28:60 (ASV)

Moreover, he will bring upon you all the diseases of Egypt ,
&c.] All that in a way of judgment were brought upon the Egyptians for refusing to let Israel go; or all such diseases as were peculiar to them, and common among them, as the leprosy, the itch, ulcers

which you were afraid of ;
when living among them, lest they should catch them of them, or they should be inflicted upon them by the hand of God:

and they shall cleave unto you ;
not only should come upon them, but continue with them; they should not easily get rid of them, or be cured of them.