Denver, CO. – A vaccination site at Dick’s Sporting Goods Park, run by Centra Health, closed early on Wednesday due to some recipients of the vaccine having an adverse reaction.

The site was located in Commerce City about 8 miles northeast of Denver and the COVID vaccine being used was supplied by Johnson & Johnson. The site closed around 3:30 after 11 people experienced an adverse reaction. At least two of the people were taken to the hospital for observation.

“Following the administration of the J&J vaccine and during onsite observation, we saw a limited number of adverse reactions to the vaccine. We followed our protocols and in an abundance of caution, made the decision – in partnership with the state – to pause operations for the remainder of the day.” – statement from Centra Health

Over 600 people who were still in line waiting to receive the vaccine were sent home and rescheduled for Sunday. The company did not disclose what type of adverse reactions the individuals had.

“The state has no reason to believe that people who were vaccinated today at Dick’s Sporting Goods Park should be concerned. Adverse reactions are typically immediate. Health care providers monitor patients for reactions after administering vaccines for at least 15 minutes after the injection (or for 30 minutes if the patient has a history of anaphylaxis) for this reason. This event is not impacting other vaccine providers.” – Statement from Colorado 

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Johnson & Johnson’s vaccine has been given to approximately 80,000 individuals in Colorado. It is shown to be 66 percent effective at preventing COVID and 85 percent effective at preventing severe cases.