A comprehensive control strategy based on interventions to reduce the rate of transmission of S. japonicum infection from cattle and humans to snails was highly effective. These interventions have been adopted as the national strategy to control schistosomiasis in China.

A point prevalence study of hepatitis E virus (HEV) in Chinese blood donors was conducted, and the prevalences of antibodies against HEV immunoglobulin G (IgG) and IgM among Chinese blood donors were 32.60% and 0.94%, respectively. HEV viremia was 0.07%.Hepatitis E virus (HEV) can cause sporadic as well as epidemic hepatitis. While HEV transmission usually occurs by eating and drinking contaminated foods and water (4), blood transfusion is another route of infection (1).During HEV infection, the first antibody to appear is immunoglobulin M (IgM) at week 4, followed by IgG at week 5 (2). The usual length of IgM positivity is between 2 and 3 months. Viremia appears during acute HEV infection at week 2 and normally lasts for 2 to 3 weeks but can last for up to 112 days (1).In China, HEV seroprevalence of the general population is about 40% and increases with age at a rate of about 1% per year (3). Acute infection, as estimated by the prevalence of IgM anti-HEV and the spontaneous rise of IgG anti-HEV levels, occurs at about 4% per year. Asymptomatic viremia has been estimated to be approximately 0.3% (5). With such figures, an appreciation of the prevalence of HEV in Chinese blood donors seems prudent from a public health perspective.

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