Dr. Tom Frieden: Why I'm cautiously optimistic about Covid-19
(CNN) — Although it's possible that deadly new coronavirus variants could emerge, I'm more optimistic today than at any point since the Covid-19 pandemic began. Here's why. Despite growing pandemic fatigue and rough weeks ahead as the Omicron tsunami recedes, we're better defended against Covid than ever. Vaccines and prior infection have steadily strengthened our collective immune defenses. We have now built up a wall of immunity -- although we have lost far, far too many people along the way to get here.