Earlier this week, large shipments of the Pfizer COVID-19 vaccine arrived at hospitals across the Garden State and tens of thousands of frontline healthcare workers began getting vaccinated. The vaccine rollout may look simple but a great deal of precise and coordinated maneuvering is taking place behind the scenes. Staci Pacetti, a clinical assistant professor at the Rutgers Camden School of nursing, and an infectious disease specialty pharmacist, said the Pfizer vaccine is a new type of mRNA vaccine made of genetic material that essentially teaches your immune system to defend itself from the novel coronavirus. But in order to be effective the vaccine must be kept at an ultra-cold minus-70 degrees Celsius.