The new coronavirus has swept across the world, killing nearly a million people and making more than 30 million sick. The effect on the global economy has been devastating even though the US stock market is ignoring the economy. As investors look for profitable investments in this era of Covid-19, vaccine makers come to mind. There are a hundred potential vaccines under development and several in trials in the final stage before getting approved. The question for investors is this: are Covid-19 vaccines a good investment?