David Leonhardt
COVID origin mystery persists: Here are arguments for and against animal-to-human and Wuhan lab leak theories
The origin of the Covid virus remains the pandemic’s biggest mystery, with U.S. officials remain the most divided ...
Infographics: Vaccinated vs. unvaccinated — Death risk differences are startling
Some of the timeliest data on Covid-19 outcomes by vaccination status comes from New York City and the Seattle area, and ...
Omicron appears to be peaking
The number of new Covid-19 cases in New York City rose more than twentyfold in December. In the past few ...
Considering Omicron’s milder impact, how should we alter our behavior?
The latest evidence about Covid is largely positive. A few weeks ago, many experts and journalists were warning that the initial ...
US COVID deaths are increasingly concentrated in Republican-voting regions
There simply was not a strong partisan pattern to Covid during the first year that it was circulating in the ...
Vaccines and the founding of the United States: The American Revolution succeeded thanks in part to an immunization mandate
The United States owes its existence as a nation partly to an immunization mandate. In 1777, smallpox was a big ...