Clot mystery thickens: Opinion divided over AstraZeneca vaccine roll-out

Thailand, Bulgaria delay jab launch; WHO, France, Germany support shot

Problems with AstraZeneca’s Covid-19 vaccine have deepened, with at least 10 countries suspending use of the shot over safety concerns that the World Health Organization, Canada, Germany, and France — along with many other nations —say are unfounded. The company, too, clarified that there was no evidence “of an increased risk of pulmonary embolism or deep vein thrombosis.”

Austria was the first to raise concerns last weekend when it stopped using some supplies of AstraZeneca’s vaccine as a precaution following reports of a death and illness among recipients.

In rapid succession, Denmark, Italy and Norway echoed the move, pointing to