The PGinVivo System utilizes the PepGel platform technology and is designed for easily encapsulating cells, antigen, virus, drugs, and compounds and then carrying them into the targeted locations In Vivo. PGinVivo is the home for cells, biocompatible, bio-absorbable, injectable, so-gel reversible by slightly shearing force, nutrients diffusible through, easy for handling at room condition or 37°C. PGinVivo is the perfect tool for research with animals and clinical applications for both animals and human.