The administration of United States President Donald Trump has said it will not work with an international cooperative effort to develop and distribute a Covid-19 vaccine because it does not want to be constrained by multilateral groups like the World Health Organization (WHO).

The decision to go it alone, first reported by The Washington Post, follows the White House's decision in early July to pull the US out of the WHO. Trump claims the WHO is in need of reform and is heavily influenced by China.

Some nations have worked directly to secure vaccine supplies, but others are pooling efforts to ensure success against a disease that has no geographical boundaries. More than 150 countries are setting up the Covid-19 Vaccines Global Access Facility, or COVAX.

That cooperative effort, linked with the WHO, would allow nations to take advantage of a portfolio of potential vaccines to ensure their citizens are quickly covered by whichever ones are deemed effective.

The WHO says even governments making deals with individual vaccine makers would benefit from joining COVAX because it would provide backup vaccines in case the ones being made through bilateral deals with manufacturers are not successful.

"The United States will continue to engage our international partners to ensure we defeat this virus, but we will not be constrained by multilateral organisations influenced by the corrupt World Health Organization and China," said White House spokesperson Judd Deere on Tuesday.

"This president will spare no expense to ensure that any new vaccine maintains our own Food and Drug Administration's gold standard for safety and efficacy, [and] is thoroughly tested and saves lives."