When COVID-19 was declared a pandemic on March 11, 2020, even some of the most informed people knew little about coronaviruses — and far less about SARS-CoV-2, the new coronavirus that was upending the world as we knew it. That was just the beginning. Since then, we’ve learned a great deal more. Many public health experts believe the light at the end of the tunnel is real, if the world remains vigilant about taking precautions, tracking cases and getting vaccines into arms. Read more here.