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.
In the United Kingdom, no infant given three doses developed Hib disease in the short-term (boosters may be required for long-term protection), and recent postmarketing studies have confirmed the high effectiveness of vaccination of infants against Hib in Germany and pertussis in Sweden.,,