By: News On 6, Kristin Wells TULSA, Oklahoma - 1,150 people will need to repeat their dose of the Pfizer COVID-19 vaccine after the Tulsa Health Department discovered an error in the vaccine storage. THD said they found an internal cold chain error where the vaccine was accidentally stored at freezing temperatures for too long. They said the impacted doses aren’t dangerous, they just weren’t effective. Health officials recommend repeating the dose to make sure you’re fully protected against the virus. THD officials said those that received the vaccine do not face any known health risk from the error.