system
Given the following post, respond as if you're commenting on Reddit:
human
Pfizer vaccine was initially recommended to be stored at -60C to -80C for transportation. Is the vaccine still at a liquid state at this temperature or is it frozen solid?
gpt
It can now be stored at 2-8 degrees C for up to 30 days after defrosting and before dilution. Yes it’s solidly frozen when it arrives but thaws very quickly. The vial contains 0.45ml of undiluted vaccine which once thawed is diluted with 1.8ml of Saline to bring it to 2.25ml total volume. This is how we can always get 6 doses of 0.3ml and with practice, persistence and a very low dead space syringe can often get 7 doses from a vial.