But the exact quid pro quo between Israel and Pfizer is unclear, even after a redacted version of the agreement was released by the Israeli Ministry of Health on Sunday.

Neither Israel nor Pfizer would say how much Israel has paid for the vaccines, though Edelstein called it a “classical win-win” for both sides. Israeli media have reported that Israel paid at least 50 percent more than other countries.

The data is reportedly being shared with the World Health Organization, but the global body did not respond to repeated requests for comment.