What if the first coronavirus vaccines aren’t the best?

What if the first coronavirus vaccines aren’t the best? Many of the vaccines at the front of the pack today try to teach the body the same basic lesson. They deliver a protein that covers the surface of the coronavirus, called spike, which appears to prompt the immune system to make antibodies to fight it off. But some researchers worry that we may be pinning too many hopes on a strategy that has not been proved to work. https://ift.tt/eA8V8J