Current problems in drug delivery

Problems with currently available drug and vaccine delivery vehicles.

•  Drugs or vaccine delivery vehicles which use lipid and lipid nanoparticles are toxic.
  
  
•  Drugs or vaccine delivery vehicles which use stem cell derived exosomes are expensive and time consuming to obtain the exosomes.
  
  
•  Drugs or vaccine delivery vehicles which use bovine milk derived exosomes are tedious to isolate and illicit immune response.