I am very much aware of the fact that there are various plagues and sicknesses that have and are yet to come upon mankind which where not in the Bible. So this had made me to understand that there is God and his words always comes to pass. What was being prophecied by God's servant is what has come to take place now.

61 Also every sickness, and every plague, which is not written in the book of this law, them will the Lord bring upon thee, until thou be destroyed. (Deut 28:61 AKJV)

God directing us to circumcise male children on the 8th day has also proven to us that science has a major role to play in our lives as it has made us understand why we need to do so. We should also be thankful to God for giving scientist wisdom to be able to make science related findings.