Explainer: The R0 is now 'at or above 1', but what does that mean for Covid-19 in Ireland?

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Health officials have voiced 'a level of concern' about the current situation, but how much concern should there be?

Prof Philip Nolan, Chair of NPHET Irish Epidemiological Modelling Advisory Group. Image: RollingNews.ie Prof Philip Nolan, Chair of NPHET Irish Epidemiological Modelling Advisory Group. Image: RollingNews.ie DESPITE ACTING CHIEF medical officer Dr. Ronan Glynn saying last night that Covid-19 is “stable” in this country, health officials are nonetheless voicing “a level of concern” about the current situation.

The R0 has become a highly publicised metric in gauging the prevalence of Covid-19 across populations. The number refers to the number of other people infected by one confirmed case. If the R0 is kept below 0 then the virus will eventually die out in a population but, as Nolan has previously explained, until there is a vaccine for the virus there is always the potential for the virus to be reintroduced into a population. If the more relaxed measures also succeed in containing the disease, and R0 doesn’t go above 1.1, the reduction number just keeps above 1, and we get a small increase in cases, the reimposition of measures will suppress the disease again.

For reference, on the April day when Nolan made the above statement there were 629 new cases reported. Yesterday, 23 new cases were reported and it’s expected that the number will be somewhere above 90 for the week. #Open journalism No news is bad news Support The Journal Your contributions will help us continue to deliver the stories that are important to youIn that case it came on the back of 687 new cases being reported on one day, 549 of which were in one region and were connected to an outbreak in a meat-processing plant.

 

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