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.
EE bonds earn interest for up to 30 years. You can cash them after 1 year. But if you cash them before 5 years, you lose the last 3 months' interest. (For example, if you cash an EE bond after 18 months, you get the first 15 months of interest.)