Making the world better, one answer at a time. a superbug is a micro-organism that is resistant to most anti-biotics. the superbugs in recent history are imune to all anti-biotics,except one.
Both electronic and paper versions of Series I savings bonds are purchased at face value and earn interest until they are redeemed or reach maturity. You must hold Series I bonds for at least 12 months before redeeming them. Series I savings bonds will continue to earn interest for up to 30 years. They will cease paying interest once they have matured.
After they are 12 months old. 1  If you redeem an EE bond before it is five years old, you will lose the last three months of interest. 2  EE bonds earn interest for 30 years if you don't redeem the bonds before they mature. So the longer you hold the bond (up to 30 years), the more it is worth.