By Michael W. Chapman | April 15, 2021 | 2:59pm EDT (Getty Images) Denmark is the first country in Europe to abandon the use of the AstraZeneca COVID vaccine because of side effects, which are very rare but may have caused blood clotting in some patients who received the vaccine. "European regulators said that as of March 22, they had carried out detailed reviews of 86 cases [of clotting], 18 of which had been fatal," reported the Also, as of April 4, "European regulators had received reports of 222 cases of the rare blood-clotting problem in Britain and the 30-nation European Economic Area (the European Union plus Iceland, Norway and Liechtenstein)," reported