A fund-raising conference on Monday organized by the European Union brought pledges from countries around the world — including Japan, Canada, Australia and Norway — to fund laboratories that have promising leads in developing and producing a vaccine. Prime ministers, a king, a prince, and Madonna all chipped in to an $8 billion pot to fund a coronavirus vaccine, but President Trump skipped the chance to contribute. Officials in his administration noted that the United States is pouring billions of dollars into its own research efforts.

For more than three hours, one by one, global leaders said a few words over a video link and offered their nations’ contribution, small or large, whatever they could muster. For Romania, it was $200,000. For Canada, $850 million. The biggest contributors were the European Union and Norway, with each pledging one billion euros, or $1.1 billion.

The details of how the money raised will be distributed remain to be sorted out. The European Commission, the executive branch of the European Union that spearheaded the initiative, said the money would be spent over the next two years to support promising initiatives around the globe. The ultimate goal is to deliver universal and affordable access to medication to fight Covid-19, the disease caused by the coronavirus.

The multilateral effort stood in sharp contrast to the solo road the United States is on as scientists everywhere scramble to develop a vaccine to stop the virus that has ravaged most parts of the globe, leaving 250,000 dead so far. In Washington on Monday, senior Trump administration officials sought to talk up American contributions to coronavirus vaccine efforts worldwide, but did not explain the United States’ absence at the European-organized conference.

The U.S. government has spent money on vaccine research and development, including $2.6 billion through the Biomedical Advanced Research and Development Authority, an arm of the Health and Human Services Department. Jim Richardson, the State Department’s director of foreign assistance, said American companies had also provided $7 billion so far toward a coronavirus vaccine and treatment.

And the United States was not the world’s only major power to be absent from the teleconference. Russia, too, did not participate.