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.
Wait at least twenty years for the best investment. EE savings bonds double in value at the 20 year mark, meaning that if you want to get the best bang for your buck, wait until the bond has reached its 20 year maturity. Say you have a bond worth $100 and an interest rate of .20%.