We published an article earlier this month that contained incorrect estimates for the basic reproduction number (R0) for COVID subvariants BA.4/BA.5 and BA.2. We have now corrected the error, but I ...

Here in New York the coronavirus cases are exploding—we’re on the steep part of the curve. Now, you’ve probably heard about the basic reproduction number, R 0, or R-naught. And that’s basically how ...

The end of the coronavirus pandemic will most likely be tied to the development of a vaccine — a process that could take about 18 months. But countries under lockdown could resume normal activities ...

The disease has afflicted humans ever since there have been humans. Malaria and tuberculosis are thought to have ravaged Ancient Egypt more than 5,000 years ago. From AD 541 to 542 the global pandemic ...

If you saw the 2011 movie "Contagion," about a worldwide pandemic of a new virus, then you've heard the term R0. Pronounced "R naught," this isn't just jargon made up in Hollywood. It represents an ...

The coronavirus disease 2019 (COVID-19) pandemic started with an outbreak of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in Wuhan, Hubei province, China, in December 2019. Since ...

Four months ago, the phrase “R number” didn’t mean much to anyone except epidemiologists and infectious disease experts. But as the coronavirus pandemic has raced around the world, infecting millions ...

Two ongoing outbreaks have dominated headlines in the past few months. Since the beginning of the year, measles has sickened at least 940 people in 26 U.S. states as of May 24. In Congo, Ebola has ...