WHY THE POISONATIONS ARE STORED AT -40C TO -90C

PFIZER STORAGE AND PREPARATION
https://www.cdc.gov/vaccines/covid-19/info-by-product/pfizer/downloads/storage-summary.pdf
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ALUMINUM OXIDE STUDY - https://www.hindawi.com/journals/jnm/2019/2076341/
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3 GRAPENE OXIDE STUDIES RELATED TO TEMPERATURE:
1 - https://pubmed.ncbi.nlm.nih.gov/31853083/
2 - https://pubmed.ncbi.nlm.nih.gov/28841008/
3 - https://pubmed.ncbi.nlm.nih.gov/30539967/
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GRAPHENE OXIDE CAN AFFECT ICE FORMATION (2021)
https://pubmed.ncbi.nlm.nih.gov/34549075/