NEW YORK (AP) — It was anxiety — and not a problem with the shots — that caused fainting, dizziness, and other short-term reactions in dozens of people atclinics in five states, U.S. have concluded.
the clusters detailed Friday by the Centers for Disease Control and Prevention are an example of a phenomenon that’s been chronicled for decades from a variety of different vaccines. Some people get so freaked out by injections that their anxiety spurs a physical reaction.
“We knew we were going to see this” as mass, said Dr. Noni MacDonald, a Canadian researcher who has studied similar incidents.
Thecame in over three days, April 7 to 9, from California, Colorado, Georgia, Iowa, and North Carolina. The by clinic staff.
affected either fainted or reported dizziness. Some got nauseous or vomited, and a few had racing hearts, chest pain, or other symptoms. None got seriously ill.
All received the, and four of the five clinics temporarily shut down as officials tried to sort out what was happening. Health officials at the time said they had no to suspect a problem with the vaccine itself.
Of the threeauthorized in the U.S., only J&J’s requires just one dose. That probably makes it more appealing to them “more highly predisposed to anxiety-related events,” the CDC report said. Some of the sites advertised they were giving J&J shots, noted Dr. Tom Shimabukuro, who leads the CDC’s safety monitoring work and is one of the study’s authors. The CDC found that about a quarter of the people reporting .
The post-shot reactions differ from a sporadic kind of side effect that led to a. At least 17 vaccine recipients have developed an uncommon type of that developed in unusual places, such as veins that drain blood from the brain, along with abnormally low levels of the platelets that form clumps.
Other types of sideare not unusual. Another CDC report released Friday looked at side effects reported by more than 300,000 J&J vaccine recipients. More than half said they experienced a sore arm, fatigue, or headache. A third reported fever or chills, and about a fifth said they were nauseous.