Lesbos health authorities sounded the alarm when a 36-year-old woman developed symptoms of thrombosis a few days after vaccination.
According to preliminary information, which was released on TV channel ERT, the young woman was admitted to a hospital on the island on 22 May. She was diagnosed with thrombosis.
The patient was vaccinated with AstraZeneca ten days before hospitalization. Greek TV channel OPEN even reported that a specific incident was included in the yellow card of the EOF, further investigation of the case is expected. A total of five cases of thrombosis after vaccination are being investigated in Greece.
According to RIA Novosti, the risk of cerebral venous thrombosis after the use of vaccines produced by pharmaceutical companies Pfizer and Moderna is about the same as after the AstraZeneca vaccine. But the risk of blood clots is much higher in those who have had COVID-19, according to the results of a study conducted by scientists at Oxford University.
In a study involving more than 500,000 people who have had coronavirus, cerebral thrombosis occurs with a probability of 39 cases per million. More than 480,000 people who have received the Pfizer or Moderna vaccine for COVID-19 have a four-per-million chance of having blood clots in the veins of the brain. Thrombosis in those vaccinated with the AstraZeneca vaccine can occur with a probability of five in a million after the first dose of the vaccine.
Thus, the risk of blood clots from coronavirus is 10 times higher than after using the Pfizer or Moderna vaccine, and 8 times higher than after using the AstraZeneca vaccine.
“However, all comparisons should be interpreted with caution as data are still being piled up and analyzed,” said study authors Prof. Paul Harrison and Dr. Maxime Take.
According to the study, cerebral venous thrombosis is more common in patients with COVID-19 under the age of 30, and the risk of blood clots due to coronavirus is 100 times higher (compared to the initial state of the human body).
The European Medicines Agency has concluded that vaccination with AstraZeneca can indeed cause thrombosis, but such cases are rare. The head of the agency Emer Cook once again assured that the vaccine is highly effective and its benefits outweigh the risks, reports Euronews.
According to the European Medicines Agency, women under the age of 60 are at highest risk of thrombosis. Dangerous side effects can appear within 2 weeks after the AstraZeneca vaccination.
As of March 22, more than 60 cases of blood clots were registered in those who received the vaccine, of which 18 were deaths. At the same time, over 25 million European citizens have already received the AstraZeneca vaccine.