Hundreds of Covid-19 vaccine doses tossed out in Pueblo PUEBLO, Colo. (KRDO) -- A portable storage unit malfunction forced health officials in Pueblo County to toss out hundreds of doses of the COVID-19 vaccine. According to the Pueblo Department of Public Health and Environment (PDPHE), 300 doses of the COVID-19 Pfizer vaccine have been rendered unusable. On January 4th, the vaccines were being transported from the Pueblo County Health Department to a Pueblo Fire Station to vaccinate first responders. The Pfizer vaccine has to be stored at a temperature of -94 degrees. However, vaccines must be thawed-out before usage. At that point, they must remain within 36-46 degrees Fahrenheit.