AstraZeneca (AZNCF, $99.60) vaccine linked to deadly blood clots in rare instances

The coronavirus vaccine developed by AstraZeneca PLC   has been linked to an autoimmune reaction that can lead to deadly blood clots in rare instances, according to a study by researchers in Norway and Germany.

According to the researchers in Norway and Germany, the vaccine could trigger an autoimmune reaction that causes blood to clot in the brain, the Wall Street Journal reported. The research could lead to a possible treatment to prevent the problem, the paper said. Symptoms such as dizziness and blurred vision occur several days after the vaccine is administered. But the condition can be detected by a simple blood test and easily treated in a hospital, according to the report.

Last week, there was a brief halting of the AstraZeneca vaccine rollout in Europe after several people who received the vaccine died. But later in the week, EU regulators allowed the use of the vaccine, after assessing that benefits far outweighed the risks of the vaccine.