Neurologic Complications Rare After COVID-19 Vaccines

Neurologic Problems Uncommon After COVID-19 Vaccines

Neurologic hostile occasions after COVID-19 vaccination have been uncommon, an evaluation of Vaccine Opposed Occasion Reporting System (VAERS) knowledge confirmed.

Of almost 307 million COVID vaccine doses administered within the U.S. within the first half of 2021, 314,610 (0.1%) individuals reported any hostile occasion and 105,214 (0.03%) reported neurologic hostile occasions, in accordance with Jennifer Frontera, MD, of New York College Grossman Faculty of Medication in New York Metropolis, and co-authors.

The speed of neurologic occasions after acute SARS-CoV-2 an infection was as much as 617-fold larger than after COVID vaccination, the researchers reported in Annals of Neurology.

“Total, the negative effects of COVID vaccines have been extraordinarily uncommon and far much less widespread than after COVID itself,” Frontera advised MedPage Right now.

Extra neurologic hostile occasions have been seen in individuals who obtained the Johnson & Johnson vaccine (0.15%) than the Pfizer-BioNTech (Comirnaty; 0.03%) or Moderna (Spikevax; 0.03%) photographs. For the Johnson & Johnson vaccine, the observed-to-expected ratios for Guillain-Barré syndrome (GBS), cerebral venous thrombosis (CVT), and seizures have been larger than background charges.

Reviews of GBS and CVT after the Johnson & Johnson vaccine emerged final 12 months, however reviews of seizure are comparatively new, Frontera famous. Within the Johnson & Johnson section III medical trial, seizures occurred in 4 members within the vaccine group, in contrast with one individual within the placebo group.

“Individuals ought to in all probability be cognizant of the opportunity of seizures after the adenovirus [Johnson & Johnson] vaccine, which is the one new, totally different factor we see on this report,” Frontera stated.

“This can be a very properly carried out evaluation of neurological signs and diagnoses following COVID-19 vaccination,” noticed Lyell Jones Jr., MD, of the Mayo Clinic in Rochester, Minnesota, who wasn’t concerned with the research.

“These findings affirm earlier giant inhabitants research, which additionally discovered very low charges of neurological hostile occasions following COVID-19 vaccination,” Jones advised MedPage Right now. “Whereas VAERS is restricted by its passive reporting mechanism, it is now very clear that neurological problems are a lot larger following SARS-CoV-2 an infection than following COVID-19 vaccination.”

The findings are consistent with these seen lately in England, which additionally confirmed neurologic problems occurring extra ceaselessly after COVID an infection than vaccination.

Of their evaluation, Frontera and co-authors studied VAERS knowledge collected from January 1 to June 14, 2021. They manually reviewed all free-text and coded signs reported inside 42 days of vaccine administration and grouped them into 36 diagnostic classes.

Opposed occasions that occurred inside 42 days of vaccination for individuals 12 and older have been included, after both one or two COVID vaccine doses. Booster photographs weren’t accessible throughout the research interval.

“Most negative effects have been reported on the primary day,” Frontera famous. “We included every kind of negative effects, together with headache or flu-like signs; that is why there is a spike on the primary day.”

Of all doses administered throughout the research interval, 54% have been Pfizer, 42% have been Moderna, and 4% have been Johnson & Johnson. The median age of sufferers with reported neurologic hostile occasions was 50, and 71% have been girls. The median time to onset of neurologic signs from vaccination was 1 day.

Severe occasions together with GBS, acute disseminated encephalomyelitis, transverse myelitis, and CVT have been reported in lower than 1 per 1,000,000 doses of vaccine administered.

Essentially the most generally reported neurologic hostile occasions have been headache, fatigue, dizziness, syncope, tinnitus, and sleep problem, all of which have been reported extra ceaselessly after the Johnson & Johnson shot.

The Johnson & Johnson vaccine had considerably larger reported charges of GBS and CVT than Moderna or Pfizer (all P

Total, in contrast with research that reported a composite incidence of all neurologic occasions acutely after SARS-CoV-2 an infection, the charges of occasions reported after COVID vaccines have been 132- to 617-fold decrease (0.002-0.008, with 105,214 noticed circumstances and 13,908,927 to 64,941,552 anticipated circumstances), Frontera and co-authors stated.

The research had a number of limitations, the researchers acknowledged. VAERS can’t utterly seize all potential hostile occasions, and reporting bias and diagnostic inaccuracy could play a job in some findings, they famous.

  • Judy George covers neurology and neuroscience information for MedPage Right now, writing about mind growing older, Alzheimer’s, dementia, MS, uncommon illnesses, epilepsy, autism, headache, stroke, Parkinson’s, ALS, concussion, CTE, sleep, ache, and extra. Comply with


There was no funding for this venture.

Researchers had no related conflicts of curiosity to report.

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