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.
An EE bond with an issue date in the time period from November 1982 through April 1995 earns interest either. 1  at a guaranteed rate or guaranteed rates; or. 2  at a market-based rate (85% of 6-month averages of 5-year Treasury securities yields)