"COVID-19 vaccination has substantially altered the course of the pandemic, saving tens of millions of lives globally," the study's authors said.

"However, inadequate access to vaccines in low-income countries has limited the impact in these settings, reinforcing the need for global vaccine equity and coverage."

Lead author Dr Oliver Watson said nearly 7.5 million deaths were prevented in countries covered by the Covax scheme, which aims to provide access to vaccines and tests to poorer countries.

"Our findings show that millions of lives have likely been saved by making vaccines available to people everywhere, regardless of their wealth," said Dr Watson.

https://news.sky.com/story/cov....id-19-jab-saved-20-m

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Despite the huge number of lives preserved by the vaccine's rapid rollout, the study says 600,000 more could have been saved if the WHO had met its 2021 goal.