BRUSSELS — The European Union published its coronavirus vaccine contract with AstraZeneca amid an ongoing row over delays to vaccine deliveries. It came after European Commission President Ursula von der Leyen weighed in on the dispute with the pharmaceutical company, telling a German radio station on Friday that there is "no plausible explanation" for its delay in supplying its vaccine to the EU. The European Medicines Agency is expected on Friday to authorize the use of the vaccine AstraZeneca developed with Oxford University. It would be the third cleared for use in the EU, after the BioNTech-Pfizer and Moderna vaccines. The European Commission has been locked in a dispute with the British-Swedish pharmaceutical company since it said it would deliver far smaller than expected supplies to EU member nations. The European Union is looking at legal ways to guarantee the delivery of all the COVID-19 vaccine doses it bought from AstraZeneca and other drugmakers. The Commission President increased the pressure on AstraZeneca in her interview, reiterating the EU"s view that the contract is unambiguous and its rejection of the company"s reasons for cutting planned supplies by at least 60 percent. "There are binding orders and the contract is crystal clear," she said. Von der Leyen dismissed the claims by AstraZeneca — which has blamed "glitches" in production — that under its contract with the EU it was only obliged to make "best efforts" to deliver supplies. "(The phrase) "best efforts" meant as long as it was not clear whether they (AstraZeneca) can develop a vaccine. We have now passed that time. The vaccine is here." She added that the Commission wanted to make the contract public. Later, the Commission did just that. "We want to publish it today," she said. "This is business sensitive data, that"s clear. But basically: we want to create transparency on these issues that I have just touched on. We know exactly what is in the contract, which is why it is important to us that it is now made public." In a sign of the level of EU mistrust in AstraZeneca, on Thursday Belgian authorities inspected a factory in Belgium that is part of AstraZeneca’s vaccine production chain. It followed a crisis meeting the previous evening between EU officials and the company which failed to resolve the issue. Meanwhile, both AstraZeneca and the UK, which has already been using the vaccine, insist it is efficient in older adults. This follows doubt cast in Germany by the country"s vaccination commission which declined to recommend its immediate use for people over 65. EU to "explore all options" In a reply to a letter he received from four European government leaders, EU Council President Charles Michel said the EU “should explore all options and make use of all legal means and enforcement measures at our disposal," if negotiations with drug companies don’t yield satisfaction. AstraZeneca said last week that it planned to cut initial deliveries in the EU from the scheduled 80 million doses for the first quarter of the year to 31 million doses. The company cited reduced yields from its manufacturing plants in Europe, but the EU suspects doses produced in Europe have been directed elsewhere. Michel said the use of the EU treaties would allow the EU and member states to take "appropriate urgent measures, to ensure effective vaccine production and supply for our population". The European Commission also plans to new rules strengthening the control of vaccine exports to ensure the doses it bought are delivered to the bloc’s residents. The dispute highlights the tension over vaccine supplies as Europe struggles to roll out inoculation programs against the coronavirus. AstraZeneca and UK refute German claims The UK and AstraZeneca hit back on Thursday at the draft recommendation in Germany to restrict the use of the vaccine only to people aged 18-64 for now. The country"s vaccination advisory committee cited what it said was insufficient data to judge its effectiveness for older people. "Our own authorities have made it very clear that they think the Oxford AstraZeneca vaccine is very good and efficacious," said British Prime Minister Boris Johnson. "The evidence that they"ve seen, that they"ve supplied, is that they think that it is effective across all age groups and provides a good immune response across all age groups." "The latest analyses of clinical trial data for the AstraZeneca/Oxford COVID-19 vaccine support efficacy in the over 65 years age group. We await a regulatory decision on the vaccine by the EMA in the coming days," an AstraZeneca spokesperson said. Germany’s health minister has stressed that a final decision will not be made until after Friday’s EMA meeting. — Euronews