Is it better to store exosomes after isolation or to store plasma/Serum for further isolation of exosomes ?

[jasmine BA]

Hello everyone

I want to know if the exosomes can be stored for a while after isolation or if it is better to store the purified plasma or serum? 

and If I store plasma/serum samples, Is there a risk of degradation of exosomal biological material? 

Thank you in advance