Confused about the two coronavirus metrics? Here's what you need to know.
Both values are calculated by mathematicians and scientists working to combat the pandemic and used to influence public health policies. The experts analyze vast amounts of data ― including hospital admissions, ICU admissions, deaths, self-reported symptoms and behavior surveys ― to estimate the R and K values. Each value offers a slightly different insight into the virus.What is the R number?
The R value represents the number of people that one infected person will, on average, pass the virus on to. It’s influenced by characteristics of the specific disease , such as how easily it passes from person to person. Human behavior ― i.e. how closely we follow social distancing measures ― will also impact the R number.
While it can help indicate if lockdown measures are working, the R number doesn’t offer the full picture; the R value can show if an epidemic is getting bigger or smaller, but not how large it is.. “If R equals 1 with 100,000 people currently infected, it is a very different situation to R equals 1 with 1,000 people currently infected.”The K number, or K value, is a metric used to shed light on the variations of the R number across COVID-19 cases.
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