The $12 billion in financing is part of a larger World Bank Group effort. It plans to spend up to $160 billion to help developing countries fight the COVID-19 pandemic, the bank said in a statement on Tuesday.
The World Bank said its COVID-19 emergency programs are already reaching 111 countries.
People in developing countries need safe and effective COVID-19 vaccines, it said.
The World Bank is "fast-tracking" its delivery systems so that poorer nations "have fair and equal access to vaccines," said the bank's president, David Malpass. He added that fair and equal access was important to defeat the pandemic and to "help countries experiencing catastrophic economic and fiscal impacts."
The International Finance Corporation is the agency of the World Bank that provides loans to private businesses. It is giving money to vaccine manufacturers through a $4 billion Global Health Platform, the bank said. Researchers are working on creating more than 170 possible COVID-19 vaccines.
The disease has killed more than 1 million people and sickened more than 38 million. It has also weakened many economies and left many people out of work.
The world's richest countries have already bought up most of the world's possible COVID-19 vaccine supply through 2021. This has made health experts concerned that poorer countries will not be able to get the vaccine.
The World Bank said it will use expertise and experience from its involvement in many large immunization programs worldwide and other public health efforts. The financing also is meant to help countries get medical tests and treatments and to support direction of logistics for vaccinations in the developing world.
I'm Susan Shand.