COPENHAGEN, Denmark—Denmark said on Wednesday it would buy 280,000 doses of Novavax’s potential COVID-19 vaccine for a total price of 37 million Danish crowns ($5.84 million) or roughly $20.9 per dose as part of a European Union agreement with the U.S. company. The European Commission said earlier this month it had approved a supply contract with Novavax to buy up to 200 million doses of its COVID-19 vaccine candidate, which is yet to be approved by the EU’s drugs regulator. Denmark’s health ministry initially gave the price of the vaccines in a statement, but later retracted it and issued a new statement without the price, saying such figures were confidential and declined to comment further. The European Commission did not immediately respond to a request for comment on the matter. It is not clear whether the price given by Denmark’s health ministry is the total cost or if it excludes …