In a statement issued Tuesday, Pfizer said it would grant a license for the antiviral pill to the Geneva-based Medicines Patent Pool, which would let generic drug companies produce the pill for use in 95 countries, making up about 53% of the world’s population.

The deal excludes some large countries that have suffered devastating coronavirus outbreaks. For example, while a Brazilian drug company could get a license to make the pill for export to other countries, the medicine could not be made generically for use in Brazil.

Still, health officials said the fact that the deal was struck even before Pfizer’s pill has been authorized anywhere, could help to end the pandemic quicker.

“It’s quite significant that we will be able to provide access to a drug that appears to be effective and has just been developed, to more than 4 billion people,” Esteban Burrone, head of policy at the Medicines Patent Pool, said.