The New York Times: Caution vs. optimism

Good morning. Cases are rising again in the U.S., even as the vaccine campaign accelerates. We explain why.
The news about the state of the pandemic in the U.S. has been largely positive in the past few months. The vaccines are highly effective, and millions of people are receiving doses each day. Cases, hospitalizations and deaths have fallen sharply from their January peaks…more:nytimes