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.
The final maturity of EE bonds is 30 years from the issue date, at which time they stop paying interest. For bonds issued after June 2003, final maturity is 10 years after the original maturity. EE bonds will continue to pay the original rate of interest for the final 10 years unless the Treasury announces a change.