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.
Hib meningitis is caused by bacteria called Haemophilus influenzae type b. Until the introduction of the Hib conjugate vaccine, this was the main form of meningitis in young children in the UK and Ireland. It affects mainly children under 4 years of age 1.Nowadays, Hib is rare in all age groups.ib can cause a range of serious illness, most frequently meningitis. Hib meningitis is an inflammation of the lining of the brain and spinal cord.