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.
A non-marketable, interest-bearing U.S. government savings bond that is guaranteed to at least double in value over the initial term of the bond, typically 20 years. Most Series EE bonds have a total interest-paying life that extends beyond the original maturity date, up to 30 years from issuance.