This vaccine is unavailable and out-of-reach financially in rural Africa and Asia, which is why chronic hepatitis B rates remain stubbornly high and are projected to remain unchanged.
在非洲和亚洲的农村地区，这种疫苗是无法获得的，经济上也负担不起，这就是为什么慢性乙型肝炎患病率仍然居高不下，预计这种情况将保持不变。
This vaccine is unavailable and out-of-reach financially in rural Africa and Asia, which is why chronic hepatitis B rates remain stubbornly high and are projected to remain unchanged.
在非洲和亚洲的农村地区，这种疫苗是无法获得的，经济上也负担不起，这就是为什么慢性乙型肝炎患病率仍然居高不下，预计这种情况将保持不变。
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