Haemophilus influenzae type b (Hib) vaccines have been available since the early 1990s. A complete course of the vaccine normally consists of three doses, which are administered in infancy, starting at around the age of six weeks. In some countries, a booster dose is also offered between 12 and 18 months of age.
These maps show the percentage coverage of the third dose of Hib vaccine worldwide from 1998 to 2007 in children <1year of age. Data were obtained from World Health Organization. The following class intervals are defined: 1%- 49%= Low; 50%- 85%= moderate; 86%- 99%= high. Globally the overall coverage has increased gradually year by year, the pattern of which depends largely on the incorporation of the Hib vaccine childhood immunisation programme.
乙型流感嗜血桿菌疫苗由九零年代初開始被使用，通常嬰孩在出生六個星期接受接種，整個療程一般包括三次注射。有些國家為十二至十八個月的小孩提供加強劑。這組地圖顯示由一九九八至二零零七年一歲以下兒童乙型流感嗜血桿菌第三劑接種的全球覆蓋率。數據源自世界衛生組織。數值區間分為1%至49%= 低; 50%至85%= 中等; 86%至99%= 高。在這十年間，全球乙型流感嗜血桿菌疫苗接種覆蓋率逐漸上升，不過整體趨勢主要取決於各國兒童免疫計劃的策略而有所不同。