A Fast Coronavirus Vaccine, Without Cutting Corners - The Wall Street Journal

Can America reopen without a major resurgence of Covid-19? We’ve learned a great deal about controlling the virus. In the summer people will spend time outdoors, which can reduce the risk. Yet a second wave could come in the fall as schools open and businesses try to return to normal. Americans will feel more confident—or simply tired—and may take fewer precautions.

Getting the threat behind us will require a vaccine cleared for general use. There are ways to accelerate that process, but it is important not to cut corners,...