God knows how to save His own people. He saved His people in Goshen during the plagues in Egypt. The Hebrews were unaffected by those plagues. Since God knows, He will have His own method of saving His people in the midst of the apocalyptic plagues. It is a matter of faith. We only have to believe in Him with all our heart, with all the power of our soul, and to begin to live the necessary spiritual life.