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 vaccine had been introduced in 192 countries by the end of 2014. Global coverage with 3 doses of Hib vaccine is estimated at 56%. There is great variation between regions. In the Americas, coverage is estimated at 90%, while it is only 21% and 30% in the Western Pacific and South-East Asia Regions respectively. Immunization prevents illness, disability and death from vaccine-preventable diseases including cervical cancer, diphtheria, hepatitis B, measles, mumps, pertussis (whooping cough), pneumonia, polio, rotavirus diarrhoea, rubella and tetanus. 2  Global vaccination coverage is generally holding steady.