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.
Interest in the next six months is then earned on the new value. (In month 7, the bond earned interest on the original price + six months of interest. EE Bonds with issue dates from May 1997 through April 2005 can now be redeemed (cashed) with no penalty (no loss of interest).