Regarding the new coronavirus vaccine, Pfizer, a major American pharmaceutical company that developed it, said that it should be transported frozen in principle, and that "transportation in a refrigerated state should be done only when the local government determines that it is unavoidable." I found that it was posted on the website for local governments.
Pfizer posted its views on vaccination on its website for local governments and healthcare professionals on 22nd of this month, before vaccination of the elderly began on 12th April.
Of these, vaccines are easily decomposed and it is necessary to avoid shock and vibration, and when transporting them in small portions to inoculation clinics, it is a general rule to freeze them.
On top of that, regarding transportation in a refrigerated state of 2 to 8 degrees Celsius, "Since it is necessary to avoid vibration from the viewpoint of quality control, we would like to ask only when it is unavoidable at the discretion of the local government."
Regarding refrigerated transportation, it became clear that Pfizer had informed the Ministry of Health, Labor and Welfare in December last year that it would not recommend it and would accept it if the local government decided that it was unavoidable. It is possible to achieve more stable quality control by transporting the products by means of transportation. "