Anxiety triggered adverse reactions to the Johnson & Johnson COVID-19 vaccine in at least 64 people — including cases that resulted in jab sites being shut down, the Centers for Disease Control and Prevention said Friday.
The CDC studied the physical reactions, including dizziness and fainting, in dozens of people who received the shots in five states between April 7 and 9, officials said.
Many of the people reported nausea, vomiting and chest pain in California, Colorado, Georgia, Iowa and North Carolina. Others said they had an elevated heart rate.
The reactions prompted some vaccine centers to temporarily shut down while health officials investigated. But the CDC determined those reactions were brought on by anxiety caused by receiving injections.
“We knew we were going to see this,” said Dr. Noni MacDonald, a Canadian researcher who has studied similar incidents.
“Of the three COVID-19 vaccines authorized in the U.S., only J&J requires just one dose. That probably makes it more appealing to