New pledges boost a global vaccine access program, but critics say more is needed

After months of uncertainty and frustration, a World Health Organization program designed to ensure access to Covid-19 vaccines in dozens of low-income countries late last week received a spate of good news.

First, one vaccine maker, Novavax (NVAX), pledged 1.1 billion doses of its shot to the WHO effort, which is known as COVAX. Meanwhile, the U.S. agreed to contribute $4 billion in aid over the next two years, with Germany adding $1.2 billion and the European Commission providing $600 million. And the U.K. promised to provide surplus vaccines to low-income countries.

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