BRUSSELS — Citing what they name “the most important problem to the worldwide group because the Forties,” the leaders of greater than two dozen international locations, the European Union and the World Well being Group on Tuesday floated a world treaty to guard the world from pandemics.

In a joint article revealed in quite a few newspapers throughout the globe, the leaders warn that the current coronavirus pandemic will inevitably be followed by others sooner or later. They define a treaty meant to supply common and equitable entry to vaccines, medicines and diagnostics, a suggestion first made in November by Charles Michel, the president of the European Council, the physique that represents the leaders of the European Union international locations.

The article argues that a world understanding much like the one which adopted World Conflict II and that led to the United Nations is required to construct cross-border cooperation earlier than the subsequent world well being disaster upends economies and lives. The present pandemic is “a stark and painful reminder that no one is secure till everyone seems to be secure,” the leaders write.

The instructed treaty is an acknowledgment that the present system of worldwide well being establishments, symbolized by the comparatively powerless World Well being Group, an company of the United Nations, is inadequate to the problem.

“There will probably be different pandemics and different main well being emergencies. No single authorities or multilateral company can handle this risk alone,” the leaders observe. “We imagine that nations ought to work collectively towards a brand new worldwide treaty for pandemic preparedness and response.”

The treaty would name for higher alert techniques, information sharing, analysis and the manufacturing and distribution of vaccines, medicines, diagnostics and private protecting gear, they mentioned.

“At a time when Covid-19 has exploited our weaknesses and divisions, we should seize this chance and are available collectively as a worldwide group for peaceable cooperation that extends past this disaster,” the leaders write. “Constructing our capacities and techniques to do that will take time and require a sustained political, monetary and societal dedication over a few years.”

The article is just not clear, nevertheless, about what would occur ought to a rustic select to not cooperate totally or to delay sharing scientific data, as China has been accused of doing with the W.H.O.

China has not signed the letter, a minimum of thus far. Neither has the USA.

In a information convention on Tuesday in Geneva, the director common of the World Well being Group, Tedros Adhanom Ghebreyesus, mentioned that when discussions on a treaty begin, “all member states will probably be represented.”

Requested if the leaders of China, the USA and Russia had been requested to signal the letter, he mentioned that some leaders had chosen to “decide in.”

“Remark from member states, together with the USA and China, was really optimistic,” he mentioned. “Subsequent steps will probably be to contain all international locations, and that is regular,” he added. “I don’t need it to be seen as an issue.”

In addition to European international locations and the W.H.O., the letter’s signatories included nations in Africa, Asia and Latin America.

On Tuesday, throughout a White Home information convention, Jen Psaki, the White Home press secretary, mentioned that though the USA was open to additional world collaboration, the nation was hesitant to enter into treaty negotiations.

“We do have some issues primarily concerning the timing and launching into negotiations for a brand new treaty proper now,” Ms. Psaki mentioned, “and we imagine that would divert consideration away from substantive points concerning the response, preparedness for future pandemic threats.”