A late-stage study of Johnson & Johnson’s COVID-19 vaccine candidate has been paused while the company investigates whether a study participant’s “unexplained illness” is related to the shot.

The company said in a statement Monday evening that illnesses, accidents, and other so-called adverse events “are an expected part of any clinical study, especially large studies,” but that its physicians and a safety monitoring panel would try to determine what might have caused the illness.

The pause is at least the second such hold to occur among several vaccines that have reached large-scale final tests in the U.S.

The company declined to reveal any more details about the illness, citing the participant’s privacy.

Temporary stoppages of large medical studies are relatively common. Few are made public in typical drug trials, but the work to make a coronavirus vaccine has raised the stakes on these kinds of complications.

Companies are required to investigate any serious or unexpected reaction that occurs during drug testing. Given that such tests are done on tens of thousands of people, some medical problems are a coincidence. In fact, one of the first steps the company said it will take is to determine if the person received the vaccine or a placebo.

The halt was first reported by the health news site STAT.

Final-stage testing of a vaccine made by AstraZeneca and Oxford University remains on hold in the U.S. as officials examine whether an illness in its trial poses a safety risk. That trial was stopped when a woman developed severe neurological symptoms consistent with transverse myelitis, a rare inflammation of the spinal cord, the company has said. That company's testing has restarted elsewhere.

Johnson & Johnson was aiming to enroll 60,000 volunteers to prove if its single-dose approach is safe and protects against the coronavirus. Other vaccine candidates in the U.S. require two shots.

Share:
More In Business
Michigan Judge Sentences Walmart Shoplifters to Wash Parking Lot Cars
A Michigan judge is putting sponges in the hands of shoplifters and ordering them to wash cars in a Walmart parking lot when spring weather arrives. Genesee County Judge Jeffrey Clothier hopes the unusual form of community service discourages people from stealing from Walmart. The judge also wants to reward shoppers with free car washes. Clothier says he began ordering “Walmart wash” sentences this week for shoplifting at the store in Grand Blanc Township. He believes 75 to 100 people eventually will be ordered to wash cars this spring. Clothier says he will be washing cars alongside them when the time comes.
State Department Halts Plan to buy $400M of Armored Tesla Vehicles
The State Department had been in talks with Elon Musk’s Tesla company to buy armored electric vehicles, but the plans have been put on hold by the Trump administration after reports emerged about a potential $400 million purchase. A State Department spokesperson said the electric car company owned by Musk was the only one that expressed interest back in May 2024. The deal with Tesla was only in its planning phases but it was forecast to be the largest contract of the year. It shows how some of his wealth has come and was still expected to come from taxpayers.
Goodyear Blimp at 100: ‘Floating Piece of Americana’ Still Thriving
At 100 years old, the Goodyear Blimp is an ageless star in the sky. The 246-foot-long airship will be in the background of the Daytona 500 — flying roughly 1,500 feet above Daytona International Speedway, actually — to celebrate its greatest anniversary tour. Even though remote camera technologies are improving regularly and changing the landscape of aerial footage, the blimp continues to carve out a niche. At Daytona, with the usual 40-car field racing around a 2½-mile superspeedway, views from the blimp aptly provide the scope of the event.
Is U.S. Restaurants’ Breakfast Boom Contributing to High Egg Prices?
It’s a chicken-and-egg problem: Restaurants are struggling with record-high U.S. egg prices, but their omelets, scrambles and huevos rancheros may be part of the problem. Breakfast is booming at U.S. eateries. First Watch, a restaurant chain that serves breakfast, brunch and lunch, nearly quadrupled its locations over the past decade to 570. Fast-food chains like Starbucks and Wendy's added more egg-filled breakfast items. In normal times, egg producers could meet the demand. But a bird flu outbreak that has forced them to slaughter their flocks is making supplies scarcer and pushing up prices. Some restaurants like Waffle House have added a surcharge to offset their costs.
Load More