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.
Series EE Bonds earn market-based rates that change every 6 months. There is no way to predict when a Series EE bond will reach its face value. For example, a Series EE Bond earning an average of 5% would reach face value in 14 1/2 years while a bond earning an average of 6% would reach face value in 12 years.