Pexels The rollout of Covid-19 vaccines in SA holds the key for accelerated economic expansion. Will the government get it right? Optimism that the global economy would quickly rebound in 2021 as mass vaccination programmes quash Covid-19, has begun to fade in the face of resurgences of the virus around the world and concern that the vaccines intended to protect against illness will be less effective against rapidly spreading mutations of the virus. Economists have begun to warn of significant downside risk to projections made just weeks ago, as countries hit by more severe second waves of infections reimpose restrictions on activity and evidence emerges that the coronavirus will remain a global threat for years to come.