For more than two centuries, vaccines been used to generate protective immunity against diseases. Vaccines generally contain attenuated viruses, inactivated viruses/toxins, or pathogenic subunits. Nucleic acid-based vaccines induce a cell-mediate immune response without the presence of adjuvants, thus providing an advantage over subunit vaccines; they are also incapable of infecting the host, so they are a safer alternative compared to attenuated versions. The Seeker is searching for formulation improvements with a focus on RNA replicon vaccines.
兩個(gè)多世紀(jì)以來，疫苗一直用于產(chǎn)生針對疾病的保護(hù)性免疫。疫苗通常含有減毒病毒，滅活病毒/毒素或致病亞單位。基于核酸的疫苗在不存在佐劑的情況下誘導(dǎo)細(xì)胞介導(dǎo)的免疫應(yīng)答，因此提供優(yōu)于亞單位疫苗的優(yōu)勢; 它們也無法感染宿主，因此與減毒版相比，它們是更安全的替代品。搜索者正在尋找配方改進(jìn)，重點(diǎn)是RNA復(fù)制子疫苗。
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