'Deadly' in the Bible

Furthermore, I will strike her followers with a deadly disease, and then all the churches will know that I am the one who searches minds and hearts. I will repay each one of you what your deeds deserve.

And I saw one of his heads as it were wounded to death; and his deadly wound was healed: and all the world wondered after the beast.

And he exerciseth all the power of the first beast before him, and causeth the earth and them which dwell therein to worship the first beast, whose deadly wound was healed.