The declare: Four Pfizer COVID-19 vaccine trial individuals created facial paralysis
Since the U.S. Food and Drug Administration approved emergency use of the Pfizer-BioNTech COVID-19 vaccine on Dec. 11, deployment of the vaccine started Dec. 14. While the vaccine heralds an finish to the practically yearlong pandemic, some on social media are elevating considerations.
“Four Pfizer vaccine volunteers (for COVID-19) develop Bell’s palsy,” claims a Dec. 12 Facebook submit.
An rationalization of Bell’s palsy is later supplied (“a condition that causes a weakness or paralysis of the muscles in the face”), and the submit claims the aspect impact is being thought of a “‘non-serious’ reaction” regardless of the worrisome picture included of three people with lopsided facial expressions.
Readers are inspired to substantiate the discovering for themselves by following a hyperlink to an “FDA.gov review” supplied on the backside.
Similar posts elsewhere on Facebook echo the findings however as a substitute share a screenshot of a Daily Mail headline juxtaposed with a picture of three totally different people additionally with some form of facial palsy.
USA TODAY has reached out to each Facebook customers who shared the posts.
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Bell’s palsy possible unrelated to vaccine
On Dec. 10, the FDA’s Center for Biologics Evaluation and Research held the 162nd assembly of the Vaccines and Related Biological Products Advisory Committee to debate the emergency use authorization of the Pfizer-BioNTech COVID-19 vaccine.
A 53-page briefing famous that there had been 4 circumstances of Bell’s palsy among the many vaccinated group and none among the many placebo group. Symptoms occurred at totally different time factors: For one participant, the situation occurred three days post-vaccination however resolved inside three days; for the opposite three, signs appeared at 9, 37 and 48 days following vaccination and lasted for about 10, 15 and 21 days, respectively.
While creating a short lived neuromuscular situation throughout a vaccine trial might sound regarding, it’s best to place this discovering into perspective. The annual incidence fee for Bell’s palsy inside the basic inhabitants is round 23 circumstances per 100,000 individuals or 15-30 per 100,000 individuals, based on some inhabitants research. Translating that to the trial’s 4 circumstances out of 38,000 trial individuals, it computes to solely 11 circumstances per 100,000 individuals.
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Thus as a result of the discovering was “consistent with the expected background rate in the general population,” the trial dominated there was “no clear basis upon which to conclude a causal relationship” between the vaccine and the prevalence of Bell’s palsy.
The briefing did acknowledge the FDA will proceed to watch for any new circumstances or studies of Bell’s palsy as soon as the vaccine is deployed into bigger populations.
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What causes Bell’s palsy?
It is unclear why the 4 individuals created Bell’s palsy and little is understood about what precisely causes the situation. One prevailing idea is that herpes simplex virus often is the wrongdoer.
HSV is available in two varieties, relying on the route of transmission — oral for HSV-1 and genital, or sexually transmitted, for HSV-2. It is HSV-1 which may be hiding away deep inside facial nerves in a deactivated kind, activating solely when its human host comes below stress. Viral activation results in an infection and harm to the native facial nerves, ensuing within the attribute facial drooping or muscle weak spot.
According to the Centers for Disease Control and Prevention, practically 48% of the U.S. inhabitants has HSV-1 per 2015-2016 information. This proportion could possibly be greater since a person contaminated with the virus might by no means present signs.
While herpes is a lifelong an infection, Bell’s palsy is totally treatable with anti-inflammatory medicine like corticosteroids and, in some extreme circumstances, antiviral remedy as nicely. Approximately 80%-90% of sufferers recuperate absolutely inside six weeks to 3 months. Recurrence for Bell’s palsy is estimated at 5% to fifteen%.
There are sure situations that may put a person at the next danger for creating Bell’s palsy, akin to being pregnant, hypertension or diabetes.
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Images not related to COVID-19 vaccine trial
The first picture of three people towards a vibrant blue background might depict sufferers with Bell’s palsy, simply not from the Pfizer COVID-19 vaccine trial.
USA TODAY discovered the picture on NccMed.com, a Nigerian-based web site providing “health advice” and “nutrition tips,” in an article courting again six months in the past. Another occasion of the picture was present in a quizlet from 5 months in the past. However, it’s unclear whether or not the people depicted really have already Bell’s palsy.
One particular person from the second picture alongside the Daily Mail headline will be present in an article on tetanus; one other will be present in an American Academy of Ophthalmology article from May 2008 and is clearly characterised as having a “left facial palsy.”
USA TODAY has reached out to each Pfizer and the FDA to confirm the origin of the pictures.
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Our score: Missing context
We fee this declare MISSING CONTEXT, as a result of with out extra context it may be deceptive. According to a Dec. 10 briefing doc from the U.S. Food and Drug Administration, 4 volunteers from Pfizer-BioNTech’s COVID-19 vaccine trial did develop a kind of facial paralysis/weak spot known as Bell’s palsy. However, this was not thought of vital, given it was similar to incidence of Bell’s palsy within the basic inhabitants. It can be essential to notice a correlation between two occasions, phenomena or variables doesn’t indicate causation.
The pictures included within the posts don’t seem like the precise trial individuals and with exception of 1 particular person characterised as having facial paralysis, it’s unclear whether or not any of the opposite individuals depicted really have already Bell’s palsy.
Our fact-check sources:
USA TODAY, Dec. 11, “‘A historic event for humanity’: US reaches turning point in fight against COVID-19 as FDA authorizes Pfizer vaccine”
USA TODAY, Dec. 12, “First Pfizer COVID-19 vaccine shipments to be delivered to US distribution sites starting Monday”
U.S. Food and Drug Administration, Dec. 10, “FDA Briefing Document Pfizer-BioNTech COVID-19 Vaccine”
StatPearls, Nov. 18, “Bell Palsy”
BMJ Journal of Neurology, Neurosurgery & Psychiatry, Nov. 13, 2015, “Bell’s palsy: aetiology, clinical features and multidisciplinary care”
World Health Organization, May 1, “Herpes simplex virus”
Centers for Disease Control and Prevention, Feb. 7, 2018, “Prevalence of Herpes Simplex Virus Type 1 and Type 2 in Persons Aged 14-49: United States, 2015-2016”
eMedicine Medscape, June 14, 2019, “Bell Palsy”
American Academy of Ophthalmology, accessed Dec. 15, “Facial Droop, Rash, Floaters and Blurriness: “Doctor, What’s Going On?”
USA TODAY, Dec. 15, “COVID-19 vaccine trials report circumstances of transient facial paralysis. That’s not as scary because it sounds.”
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This article initially appeared on USA TODAY: Fact examine: Bell’s palsy possible unrelated to Pfizer COVID-19 vaccine