The COVID-19 vaccine being developed by the University of Oxford produces a similar immune response in both older and younger adults, and adverse responses were lower among older people, British drug maker AstraZeneca PLC said on Monday.

A vaccine that works is seen as a game-changer in the battle against the novel coronavirus, which has killed more than 1.15 million people, hammered the global economy and shuttered normal life across the world.

¡°It is encouraging to see immunogenicity responses were similar between older and younger adults and that reactogenicity was lower in older adults, where the COVID-19 disease severity is higher,¡± an AstraZeneca spokesman said.