Scientists say there is no evidence that the BA.5 version of the Omicron coronavirus variant is more transmissible than measles, or that it has a basic reproduction number, or "R-naught" (R0), of 18.6 ...

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 ...

In less than a year since the COVID-19 pandemic began, several safe and effective vaccines against the coronavirus are apparently on track to be approved and made available later this month. This ...

From March to July 1996 a measles outbreak occurred in northern Luxembourg with 110 reported cases centered around two primary schools (85 cases) and the surrounding community (25 cases). Eighty four ...

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 ...

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 ...

Researchers have used mathematical models to assess the effectiveness of the public health measures taken to contain the COVID-19 outbreak on the Diamond Princess cruise ship. The conclusion? More ...