Currently, oral and injectable vaccines are available. However, most of them require refrigeration, which can be expensive in developing countries in Africa and parts of Asia.
Currently, oral and injectable vaccines are available. However, most of them require refrigeration, which can be expensive in developing countries in Africa and parts of Asia.
目前，人们可以得到口服或注射的霍乱疫苗，但是大部份疫苗都需要冷藏，这对非洲发展中国家和一些亚洲国家来说费用太高。