Crestview continues to be committed to providing an opportunity for you to have your COVID-19 immunizations here at our clinic. The challenges we face include variable availability from Public Health and very short dates to give them out before they expire. This is particularly true for the Pfizer vaccine. After being transported from deep freeze at the WRHA to our freezer where we maintain it at -24 degrees, it must be used within 2 weeks. Once the vial has been thawed, it is only good for 6 hours.