COVID-19 vaccine rollout has begun across the world and in many places health care workers and high-risk groups are beginning to receive the shots. This offers hope for a return to normalcy amidst the pandemic. However the vaccines authorized for emergency use require two doses to be effective which can create problems with logistics and compliance. Now researchers from Stanford University have managed to construct and test a promising vaccine candidate for COVID-19. What is unique about this vaccine is that it is a single dose one and it does not require a cold-chain for storage or transport. It is also