Unless the fighters plan to innocolate themselves onsite with the refrigirated samples, then I don't think we have much to worry about.
Both cryopreserved and cryodesiccation viruses needs special handling. I don't think these fighters are mastermind terrorists, but in case I'm wrong, then I hope survaliance is keeping track of cryotransports and some carrier group can be convinced to take action with a short notice.