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The FDA updated the label on Johnson & Johnson’s vaccine. Here’s why.

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A nurse prepares a dose of the Johnson & Johnson Covid-19 vaccine in Orlando, Florida, on April 25.
A nurse prepares a dose of the Johnson & Johnson Covid-19 vaccine in Orlando, Florida, on April 25. (Paul Hennessy/SOPA Images/LightRocket/Getty Images)

The US Food and Drug Administration updated the label on Johnson & Johnson’s coronavirus vaccine Monday to warn of the possible increased risk of a rare neurological complication known as Guillain-Barré syndrome.

While the FDA said it had not established the vaccine could cause the syndrome, it noted an increase in reports of the sometimes paralyzing condition.

“Today, the FDA is announcing revisions to the vaccine recipient and vaccination provider fact sheets for the Johnson & Johnson (Janssen) COVID-19 Vaccine to include information pertaining to an observed increased risk of Guillain-Barré Syndrome (GBS) following vaccination,” it said in a statement sent to CNN.

“Reports of adverse events following use of the Janssen COVID-19 Vaccine under emergency use authorization suggest an increased risk of Guillain-Barré syndrome during the 42 days following vaccination,” the updated label reads

“Although the available evidence suggests an association between the Janssen vaccine and increased risk of GBS, it is insufficient to establish a causal relationship. No similar signal has been identified with the Moderna and Pfizer-BioNTech COVID-19 vaccines,” the label adds.

The FDA said 100 preliminary reports of Guillain-Barré syndrome had been filed with the US government’s Vaccine Adverse Reporting System, out of 12.8 million Janssen vaccines given.

“Guillain Barré syndrome (a neurological disorder in which the body’s immune system damages nerve cells, causing muscle weakness and sometimes paralysis) has occurred in some people who have received the Janssen COVID-19 Vaccine,” the FDA says in the label update for patients and caregivers.

“In most of these people, symptoms began within 42 days following receipt of the Janssen COVID-19 Vaccine. The chance of having this occur is very low,” it adds.

People should seek medical attention if they notice symptoms such as weakness or tingling in the arms and legs, especially if it spreads, after receiving a vaccine, the FDA said.

Other telltale symptoms include difficulty walking, speaking, chewing or swallowing; double vision; and bowel or bladder control problems.

The FDA said 95 of the 100 reports of GBS involved people who needed hospitalization, and one person died.

“Each year in the United States, an estimated 3,000 to 6,000 people develop GBS. Most people fully recover from the disorder,” the agency added.

“GBS has also been observed at an increased rate associated with certain vaccines, including certain seasonal influenza vaccines and a vaccine to prevent shingles.

Johnson & Johnson confirmed it was talking to the US Centers for Disease Control and Prevention and FDA about the issue.

“We have been in discussions with the U.S. Food and Drug Administration and other regulators about rare cases of the neurological disorder, Guillain-Barré syndrome, that have been reported following vaccination with the Janssen COVID-19 vaccine,” the company said in a brief statement.

“The chance of having this occur is very low, and the rate of reported cases exceeds the background rate by a small degree,” it added.

Even if the vaccine does raise the risk of the syndrome, it’s still better to get vaccinated against the coronavirus, the CDC stressed.

So did Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases.

“You’re always going to find some adverse event associated with vaccination,” Fauci told CNN’s Chris Cuomo.

“When you vaccinate tens of millions of people, you will always find a rare event. You’ve got make a decision – does the benefit outweigh the unusual risk of an adverse event? Thus far with the vaccines, it’s always been decided that the benefit of the vaccine outweighs the risk of an adverse event.”

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