Correction to: Alternative graphical displays for the monitoring of epidemic outbreaks, with application to COVID-19 mortality.

An amendment to this paper has been published and can be accessed via the original article.

Alternative graphical displays for the monitoring of epidemic outbreaks, with application to COVID-19 mortality.

Background: Classic epidemic curves - counts of daily events or cumulative events over time -emphasise temporal changes in the growth or size of epidemic outbreaks. Like any graph, these curves have limitations: they are impractical for comparisons of large and small outbreaks or of asynchronous outbreaks, and they do not display the relative growth rate of the epidemic. Our aim was to propose two additional graphical displays for the monitoring of epidemic outbreaks that overcome these limitations.

Simultaneous passively Q-switched dual-wavelength solid-state laser working at 1065 and 1066 nm.

A passively Q-switched dual-wavelength solid-state laser is presented. The two wavelengths are emitted by two different crystals in order to avoid gain competition, and the synchronization between the pulses is obtained by external triggering of the saturable absorber. Sum frequency mixing is demonstrated, proving the interest of this source for terahertz generation in the 0.