To follow government mandates

For fun and profit

For fame and recognition

To compete with other companies

Lack of trained personnel

High cost of vaccines

Need for refrigeration

Complex distribution networks

One week

One month

Three months

Six months

Lack of funding

Complexity of the disease

Shortage of researchers

Unavailability of technology

Through a drop of blood like a glucose meter

Using a smartphone app

Using a breathalyzer

By observing skin color changes