The diplomatic sources confirmed that they would give it until the end of the week before they file the lawsuit, in the culmination of a dispute that has been raging since January when AstraZeneca claimed it couldn't supply nearly as many vaccinations as it had initially promised to Europe. Earlier this month, the pharmaceutical company claimed that it was "working tirelessly" to increase its supply to Spain, after regional leaders were left furious over the impact the delays were having on Spain's vaccine rollout plan.