Every year, more than 700,000 Americans get an ischemic stroke. It is responsible for roughly 90% of all strokes. Finally, the CDC is investigating the link between Pfizer booster and strokes.
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The new Covid booster from Pfizer is under investigation by health authorities to see if it raises the risk of stroke in adults over 65.
The Food and Drug Administration (FDA) and the Centers for Disease Control and Prevention (CDC) reported that a correlation between the new injection and an increased risk of an ischemic stroke three to four weeks after vaccination was detected by their surveillance system.
According to officials, other systems set up to track vaccination injuries have not discovered a comparable correlation, leading them to feel it is more likely a statistical outlier than a genuine cause for concern.
‘Although the totality of the data currently suggests that it is very unlikely that the signal … represents a true clinical risk, we believe it is important to share this information with the public, as we have in the past, when one of our safety monitoring systems detects a signal,’ a joint statement from the CDC and FDA said.
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Blockages in the arteries that provide blood to the brain are what cause an ischemic stroke, sometimes referred to as brain ischemia.
The Vaccine Safety Datalink (VSD), a real-time surveillance system operated by the CDC, identified a potential connection between Pfizer’s vaccine and the increased risk of stroke.
The statistical threshold required to justify further investigation, according to officials, was met.
However, they continue to highly advise elders to get their vaccinations, which have been demonstrated to provide excellent protection against severe COVID.
Officials believe it is a statistical aberration because other data from the Centers for Medicare and Medicaid Services, Department of Veterans Affairs, and other sources have not revealed the same risk of stroke.
And statistics from other nations have not indicated the potential connection.
In the statement today, the FDA and CDC added ‘there may be other confounding factors contributing to the signal identified in the VSD that merit further investigation.’
The connection appears to be limited to Pfizer’s bivalent booster rather than Moderna’s, and no additional age categories seem to be impacted.
According to CDC data, 39 percent of older Americans over the age of 65 had received a bivalent booster from Pfizer or Moderna.
Pfizer stated that it has been made aware of a small number of instances of ischemic strokes in adults 65 and older after receiving their revised vaccine.
‘Neither Pfizer and BioNTech nor the CDC or the FDA have observed similar findings across numerous other monitoring systems in the US,’ Pfizer added.
‘Globally and there is no evidence to conclude that ischemic stroke is associated with the use of the companies’ COVID-19 vaccines.
‘Compared to published incidence rates of ischemic stroke in this older population, the companies to date have observed a lower number of reported ischemic strokes following the vaccination with the Omicron BA.4/BA.5-adapted bivalent vaccine.’
The CDC’s Vaccine Safety Database (VSD) collects data on vaccine-related injuries and adverse effects from injections administered across the country.
The CDC cites 13 health insurers and hospital systems as contributing to the database, with 11 giving data directly.
The VSD data is incorporated in the wider Vaccine Adverse Event Reporting System, or VAERS.
Bivalent shots from Pfizer/BioNtech and Moderna, which target both the original coronavirus and Omicron sub-variants, have been approved for use in children six months and older.
The shots were added since they directly target the Omicron variant.
The original Covid vaccinations, which were released in late 2020, were designed to combat the Wuhan strain of the virus, which arose at the start of that year.
However, the Omicron variant, which took over the globe by the end of 2021, changed to avoid being guarded from those shots.
These bivalent shots are intended to boost infection resistance and prevent the spread of the numerous developing strains of Omicron.
Despite this caution, the CDC and FDA continue to recommend that everyone aged six months and older get their COVID-19 immunization.
In recent months, White House officials have pushed these immunizations and expressed disappointment with the comparatively low uptake in the public.
Dr. Ashish Jha, the Biden Administration’s Covid response coordinator, even cautioned this past week that Americans who had not got the bivalent vaccine were vulnerable to the emerging XBB.1.5 version.
‘If you had an infection before July OR your last vaccine was before bivalent update in September… your protection against an XBB.1.5 infection is probably not that great,’ he wrote on Twitter.
According to the latest recent CDC data, 50 million Americans – roughly 15% of the US population – have gotten the upgraded booster.
However, the vast majority of those who have received the shot thus far may be at higher risk of stroke.
According to the CDC, 21 million Americans over the age of 65 have received the bivalent booster. This represents roughly two-fifths of all older citizens in the United States.
An ischemic stroke happens when the flow of blood to the brain is disrupted. This is frequently caused by a blood clot.
Within minutes after being deprived of oxygen-rich blood, brain tissue starts to degenerate.
Every year, more than 700,000 Americans get an ischemic stroke. It is responsible for roughly 90% of all strokes.
Approximately 20% of stroke cases result in death. Even survivors frequently experience lifelong brain damage that affects their ability to speak, see, and move around, among other things.
The CDC issued a warning at the beginning of the year that adolescent males who had gotten the mRNA vaccines—either the Pfizer or Moderna shot—were more likely to experience cardiac inflammation.
According to recently released documents, the FDA acknowledged deviating from the normal vaccination approval process when dealing with Pfizer’s COVID-19 vaccine approval.
The organization issued a warning that myocarditis was more common in boys 16 and older seven days after receiving the shot.
Despite the warning, officials continued to advise this age group to get the vaccine.