"Pfizer was 12 euros ($14), then it became 15 euros. Contracts are now being signed... at a price of 19.50 euros," Borissov said on Sunday.
The prices are in sharp contrast to the vaccine produced by British-Swedish drugmaker AstraZeneca, which vowed not to make a profit on its product during the pandemic and sold it to the EU for less than two euros a unit.
Bourla did not confirm the price of the Pfizer vaccine but admitted that it was sold at a higher price to developed countries like those in the EU or the United States.
"In middle-income countries, we sell it for half the price," he said.
"In poorer countries, including in Africa, we sell it at cost."