The name coupon arose because in the past, paper bond certificates were issued which had coupons attached to them, one for each interest payment. On the due dates the bondholder would hand in the coupon to a bank in exchange for the interest payment.
Hib vaccine. Haemophilus influenzae type B vaccine is a vaccine used to prevent Haemophilus influenzae type b (Hib) infection. In countries that include it as a routine vaccine, rates of severe Hib infections have decreased more than 90%. It has therefore resulted in a decrease in the rate of meningitis, pneumonia, and epiglottitis.
The Hib vaccine is very safe, and it is effective at preventing Hib disease. Vaccines, like any medicine, can have side effects. Most children who get the Hib shot have no side effects. The most common side effects are usually mild and last 2 or 3 days.