**7. Vaccine storage and cold chain maintenance**

Delivering vaccines to all corners of the world is a complex undertaking. It takes a chain of precisely coordinated events in temperature-controlled environments to store, manage and transport these life-saving products. This is called a cold chain. Vaccines must be continuously stored in a limited temperature range – from the time they are manufactured until the moment of vaccination. This is because temperatures that are too high or too low can cause the vaccine to lose its potency


#### **Table 3.**

*Dosage schedule of COVID-19 vaccines.*


#### **Table 4.**

*Cold chain temperature requirements for COVID-19 vaccine.*

(its ability to protect against disease). Once a vaccine loses its potency, it cannot be regained or restored. This cold chain temperature differs for different vaccines. Any fault in the cold chain maintenance could lead to wastage of vaccine. Storage condition requirements for various type of vaccines are described in **Table 4**.
