The C.D.C. Is Preparing for 2 Covid-19 Vaccines. Here’s What You Need to Know.

By BY CARL ZIMMER AND KATIE THOMAS from NYT Health The agency told public health agencies that two unidentified vaccines might be ready by October or November. We explain how vaccine trials work, when one might be ready, and who may get them first. https://ift.tt/3gTCQH4