Multiple countries have ordered a pause on the administration of the Oxford-Astrazeneca vaccine ever since adverse reactions, such as blood clotting incidents were reported. To date, while the vaccine remains to be one of the most popular ones to be used, it has been put under investigation and subject to a consequent ban in at least 18 countries including Denmark, which was the first to issue a halt notice and then followed by nations like Austria, Norway, Iceland, Bulgaria, Netherlands, France, Germany, Italy, Spain, Sweden and Thailand. Canadian provinces, too, halted use of Astrazeneca vaccines over similar concerns.
Some other countries, meanwhile, ordered a complete pull out particular batches of the vaccine supply which were found to be linked to adverse events.
Meanwhile, in countries like the USA, the vaccine was not issued with emergency-use authorization.