Slower progress for Sanofi and GSK's coronavirus vaccine

11 December 2020

Older adults achieved a lower immune response than hoped for in an early trial of Sanofi (Euronext: SAN) and GlaxoSmithKline’s (LSE: GSK) coronavirus vaccine.

While the firms say they retain confidence in the capacity of the adjuvanted recombinant platform to deliver an effective vaccine for all adults, the setback will mean a delay to the program.

GSK and Sanofi now plan a Phase IIb study for early 2021, including a proposed comparison with an authorized COVID-19 vaccine.

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