NEJM - Hepatitis E Vaccine

"Long-Term Efficacy of a Hepatitis E Vaccine"

"CONCLUSIONS

Immunization with this hepatitis E vaccine induced antibodies against HEV and provided protection against hepatitis E for up to 4.5 years. (Funded by the Chinese Ministry of Science and Technology and others; ClinicalTrials.gov number, NCT01014845.)"

http://www.nejm.org/doi/full/10.1056/NEJMoa1406011?query=featured_home