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.
Backed by the U.S. government, savings bonds are extremely safe. But a tradeoff for that safety is a relatively low rate of return. The current interest rate on Series EE bonds is 1.30%, through April 30, 2009. New interest rates are announced twice a year and take effect May 1 and November 1. If held for five years, Series EE bonds pay 90% of the six-month average yield on five-year Treasury securities. Earnings vary for Series EE bonds issued from 1980 to 1997, so consult your financial institution or the Bureau of Public Debt for exact figures. Many Series E bonds have stopped paying interest.