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Official: EU Agency To Confirm AstraZeneca Blood Clot Link

Manfred Haas, right, receives the AstraZeneca vaccine against the COVID-19 disease from his family doctor Oliver Funken in Rheinbach, Germany, Tuesday, April 6, 2021. In German federal state North Rhine-Westphalia, Corona vaccinations have started in GP surgeries. (Oliver Berg / DPA via AP)

A top official at the European Medicines Agency said in an interview Tuesday there is a causal link between AstraZeneca’s coronavirus vaccine and rare blood clots. It is still unclear what the connection is and if the vaccine’s risks outweigh its COVID-protecting benefits.

Marco Cavaleri, head of health threats and vaccine strategy at the Amsterdam-based agency, told Rome’s Il Messaggero newspaper that the EU medicines regulator is preparing to make a more definitive statement this week.

Based on the evidence to date, Cavaleri said there’s a clear association between the AstraZeneca vaccine and the dozens of rare blood clots that have been reported worldwide amid the tens of millions of vaccine jabs that have been given out.

Last month, more than a dozen countries, including Germany, suspended their use of AstraZeneca over the blood clot issue. Most restarted — some with age restrictions — after the EMA said the benefits of the vaccine outweighed the risks of not inoculating people against COVID-19.

At the time, the EMA recommended the vaccine’s leaflet be updated to inform doctors and patients about the rare clots.

“It is becoming more and more difficult to affirm that there isn’t a cause-and-effect relationship between AstraZeneca vaccines and the very rare cases of blood clots associated with a low level of (blood) platelets,” Cavaleri was quoted as saying.

He said he appreciated the need for an unequivocal European recommendation on the safety of the vaccine for particular age groups but said he didn’t expect the EMA to be able to provide that now.

“Certainly the information about the product will be updated, affirming that these adverse events are linked to the vaccine. It will be declared in a very clear way,” he was quoted as saying.

Any further doubts about the AstraZeneca vaccine would be a setback for the shot, which is critical to Europe’s immunization campaign and a linchpin in the global strategy to get vaccines to poorer countries.

The AstraZeneca vaccine is cheaper and easier to use than rival vaccines from Pfizer and Moderna and has been approved for use in over 50 countries and groups, including by the 27-nation EU and the World Health Organization. U.S. authorities are still in the process of evaluating the vaccine.

Most European Union countries, including Italy, resumed using the AstraZeneca vaccine on March 19.

Cavaleri said while EMA was prepared to declare a link, further study was still needed to understand why and how the phenomenon occurs.

He said the rare blood clots, including some in the brain, coupled with a low level of blood platelets that may make people at risk of serious bleeding, “seem to be the key event to study further.” Cavaleri promised more details soon, adding: “In the coming hours, we will say that the link is there, but how this happens we still haven’t figured out.”

Cavaleri said the biological mechanism for how the vaccine might be causing the rare clots was still unknown and if it was linked to how the shot is made, other vaccines with similar technologies might also need to be evaluated.

Asked about Cavaleri’s comments, the EMA press office said its evaluation “has not yet reached a conclusion and the review is currently ongoing.” It said it planned a press conference as soon as the review is finalized, possibly Wednesday or Thursday.

Cavaleri was asked how he could arrive at such a causal conclusion given the relatively few cases of adverse events.

“Among those vaccinated there is a number of cerebral thromboses with a low level of platelets among young people that is higher than what we would have expected. This we have to say,” he was quoted as saying.

But he stressed the risk-benefit analysis remained positive for the AstraZeneca jab, even for young women who appear to be more affected by the clots.

“Let’s not forget that young women also end up in intensive care with COVID. So we need to do very meticulous work to understand if the risk-benefit analysis remains for all ages,” he was quoted as saying.

He said the EMA was in a difficult situation, given the different virus outbreaks in each of the EU’s 27 nations.

“Certainly, many people would like EMA to resolve the question for everyone, but it’s not that easy,” he said. “Let’s not forget that the weight of COVID is different in various countries. In Italy there are still around 500 people dying a day, in Norway nearly no one. These factors justify a different approach.”

He ruled out a preventive therapy to address the rare blood clots, saying there is still too much unknown about the phenomenon.

(Vosizneias / AP).

 

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