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Dengue virus (DV) has occasionally emerged at epidemic levels in Yunnan, China. Vaccine development is limited by antibody‐dependent enhancement and a lack of good animal models. Thus, the study investigated cross infection based on maternal immunity in BALB/c mice and assessed the risk of cross infection by DV2‐D13113 and DV3‐YNWS2 epidemic virus strains. DV replicated within the organs of the BALB/c...
The live attenuated hepatitis A virus vaccine (HA‐L) is in routine use in the Chinese national immunization program (NIP). The major disadvantages of HA‐L include that theoretically, it may be possible for mutation shifts and secondary infections of the live vaccine viral strain. The aim of this study was to explore variation in the viral strain after vaccination with the HA‐L. A total of 1297 fecal...
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