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.
MAY 2005 TO PRESENT: EE Bonds will earn interest for up to 30 years. Interest is posted monthly. During the first 20 years, the bond will earn interest at a fixed rate established at the beginning of the period. Bonds issued during this period earn a fixed rate of interest for the first 20 years based on 10-year Treasury note yields.