Parallel processing. Normally a few labs would work on a particular vaccine. If a potential vaccine fails they have to retry something else and this whole proce

Parallel processing. Normally a few labs would work on a particular vaccine. If a potential vaccine fails they have to retry something else and this whole process can take a long time. Now, pretty much all virus labs in the world are rushing to create a vaccine. There are 70 potential candidates last time I've read, so there is a high change one them works.