Szijjártó noted that "about half a million" doses of a "Western vaccine requiring only a single jab" had been scrubbed, referring to the Janssen vaccine.

"That's why we negotiated with our Chinese partners to bring forward part of vaccine deliveries scheduled for May to April. Fortunately, the Chinese understood the difficulty we face and we could agree that, in addition to the 400,000 doses contracted for delivery in April, our Chinese partners will bring forward the delivery of 600,000 jabs that were slated to be shipped in May. So, by the end of April, the Chinese will deliver 1 million doses instead of 400,000, in two shipments. With this, we can make up for the missed shipment of Western vaccine," Szijjártó said.

Johnson and Johnson said early in the week that it decided to "proactively delay the rollout" of the Janssen vaccine in Europe after becoming aware of an "extremely rare disorder" involving people with blood clots who got the jab.