Pfizer has found an unusual enemy in its $2 billion fight over unwanted Covid-19 vaccines, targeting air-traffic control fees in a dispute with Poland and Romania. The pharmaceutical company is leveraging financial penalties to pressure the countries into accepting doses they no longer want. The strategy highlights the complex logistical and regulatory challenges surrounding vaccine distribution and international agreements.

Poland and Romania have refused to take delivery of the vaccines, citing storage and safety concerns, leaving Pfizer in a difficult position as it seeks to recover its investment. The dispute underscores the broader challenges of managing global vaccine supply chains and the legal complexities of international trade agreements.