The visitors at a mass vaccination site located in Oakland city of California received the wrong dosage of the Pfizer COVID-19 vaccines on March 1, reported KTVU. 

Two workers at the medical facility in Oakland said that around 4,300 people were inoculated with a dose that is lesser than the dose suggested amount. 

The recommended dosage is 0.3 milliliters, 0.1 milliliters more than what was administered, according to KTVU. 

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The mix-up, which was reportedly identified and resolved with a few hours, was caused due to the insufficient capacity of the syringes available at the facility. 

State authorities like the US Department of Health and Human Services, Federal Emergency Management Agency, California Governors Office of Emergency Services grouped and held an emergency meeting to deliberate on the mix-up and analyse the risks related to it. 

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The Office of Emergency Services told KTVU that unless someone has received less than half a dose of the Pfizer vaccine, there is no reason for concern. 

According to a KRON4 report, the state officials, in an attempt to calm the public, said they should be “rest assured that vaccines administered at the Coliseum are being dispensed in a manner consistent with medical and scientific best practices and will work as designed.”