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.
(electronic and paper are the same) Interest depends on when the EE Bond was issued: EE Bonds issued from May 2005 earn a fixed rate of return. EE Bonds issued from May 1997 through April 2005 earn variable rates based on 90% of the six-month average of 5-year Treasury Security yields.