John Gill Commentary Acts 28:9

"And when this was done, the rest also that had diseases in the island came, and were cured:" — Acts 28:9 (ASV)

So when this was done
This miracle was wrought, and the fame of it spread over the island:

others also which had diseases in the island came :
from all parts of it, to the apostle:

and were healed ;
of whatsoever diseases they were afflicted with.