Novel COVID-19 vaccine could offer broad immune responses across SARS-CoV-2 variants

The emerging biotech Gritstone Bio (NSDQ:GRTS) has dosed the first patient with its second-generation COVID-19 vaccine known as GRT-R910. The University of Manchester and Manchester University NHS Foundation Trust are jointly overseeing the U.K.-based Phase 1 study.

The GRT-R910 vaccine uses self-amplifying mRNA (SAM), which could optimize antigen expression at lower doses relative to conventional mRNA. The GRT-R910 vaccine targets antigens from the spike protein and highly conserved non-spike proteins on the SARS-CoV-2 virus.

Emeryville, California–based Gritstone believes the vaccine could offer a strong and durable immune response to various SARS-CoV-2 variants. It may also eliminate the need for repeat boosters, the company concluded.

The company believes that the technology will outperform the first generation of mRNA COVID-19 vaccines in those 60 and older.

“Our SAM COVID vaccine is designed to drive robust CD8+ T cell responses, in addition…

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