This seems to be an inhalant.
"Drug: EXO-CD24
The study active treatment is EXO-CD24 -exosomes (natural nano-sized vesicles secreted by human cells) that were engineered to overexpress CD24, aerosolized in normal saline for inhalation via a standard hospital-grade inhalation device, QD for 5 days."
https://clinicaltrials.gov/ct2/show/NCT04747574
No mention of the cost of the drug.
Koo