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What do you guys think: did AstraZeneca deliberately not check the purity of their vaccines with a simple SDS-PAGE? Or did they send out analysis data that was prettified in some way?
Image is from a new German preprint that was submitted to some Nature journal where they tested three AZ batches via SDS-PAGE, and GC/MS. Looks like AstraZeneca does not have their purification under control.

Paper is here: https://www.researchsquare.com/article/rs-477964/v1