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In recent years, hepatitis A virus (HAV) infection has declined considerably in China, associated with wide deployment of HAV vaccines and improvement in socio-economic indicators. Towards the elimination of HA in the country, we assessed the duration and characteristics of immunity conferred by the widely used, locally manufactured HAV vaccine.This is a longitudinal cohort study that followed recipients...
Anaplasma marginale is a devastating tick-borne pathogen causing anaplasmosis in cattle and results in significant economic loss to the cattle industry worldwide. Currently, there is no widely accepted vaccine against A. marginale. New generation subunit vaccines against A. marginale, which are much safer, more efficient and cost-effective, are in great need. The A. marginale outer membrane protein...
Influenza vaccine production using cell culture technology has become popular nowadays. However, to meet the ever increasing demand of influenza vaccine, it is prerequisite to improve the yield of influenza virus in cells. To achieve this, in the present study, the nutritional requirements of MDCK cells in the virus production process were analyzed and a nutrient-feeding strategy was developed accordingly...
To study the epidemiological patterns of hepatitis A, and immunity of entire population in Shijiazhuang prefecture, Hebei province, a former hyper-endemic area in north China.Cross-sectional, seroprevalence surveys with two-stage cluster sampling were conducted among population older than 2-year between 1992 and 2011. During the 2011 serological survey, blood samples from infants <18 months without...
Nanotechnology increasingly plays a significant role in vaccine development. As vaccine development orientates toward less immunogenic “minimalist” compositions, formulations that boost antigen effectiveness are increasingly needed. The use of nanoparticles in vaccine formulations allows not only improved antigen stability and immunogenicity, but also targeted delivery and slow release. A number of...
To evaluate the long-term efficacy of Chinese hamster ovary (CHO) cell derived hepatitis B vaccine in country community in China.A cross-sectional investigation was carried out. Children who were born between 1997 and 1999 and vaccinated with the three doses of CHO-derived hepatitis B vaccine were selected as study objects. Their serum samples were taken to test for hepatitis B virus (HBV) markers,...
Many studies have provided evidence that heat shock protein 65 (Hsp65) can elicit potent specific cellular adaptive immune responses (e.g. CD8 + cytotoxic T-cell effectors or classic CTLs) based on their ability to chaperone antigenic peptides. Hsp65 is thus an effective carrier for heterologous peptide epitopes for therapeutic vaccines against cancer or chronic infectious diseases. The core...
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