The specimens shall be transported to the corresponding laboratory within 2 working days after collection, and the storage temperature shall be 2-8oC.If the samples cannot be sent to the laboratory within 48 hours, they should be stored at -70oC or below, and the samples should be sent to the corresponding laboratory within 1 week.Repeated freeze-thaw of specimens should be avoided. https://www.rollmed.net/cryo-tub...-tube-flocking-swab.html