September 04, 2020
Gene therapies are stored and shipped at ultra-low temperature (approximately -80<sup>o</sup>C, either in a refrigerator or on dry ice). This provides a challenge to the primary package systems in maintaining container closure integrity (CCI), especially systems comprising glass vials and elastomer stoppers. These materials have different coefficients of thermal expansion. Upon cooling from room temperature to ultra-low temperature, they contract at different rates; this may lead to gaps and CCI loss.