R-number
Infection spread metric
The R-number, or reproduction number, measures how contagious an infectious disease is—specifically, the average number of people one infected person will transmit the disease to.
An R-number above 1 means an outbreak is growing; below 1 means it's shrinking.
The term entered mainstream vocabulary during the COVID-19 pandemic: The government won't ease restrictions until the R-number drops below one.
WHO-named 2019 coronavirus
- infectionPathogen invasion causing illness
- pandemicGlobal disease outbreak
- outbreakSudden eruption of trouble
- contagionDisease spread by contact
herd immunity · SARS-CoV-2 · epidemic · spread · viral load · superspreader · exponential growth · contact tracing
Comparative numerical relation
- averageArithmetic mean or ordinary
- secondary infectionsPathogens exploiting compromised hosts
- modelingSimulating or demonstrating form
- estimateInformed guess at quantity
variable · parameter · formula · projection · forecast · simulation · statistical · data
COVID-19
WHO-named 2019 coronavirus
- infectionPathogen invasion causing illness
- pandemicGlobal disease outbreak
- outbreakSudden eruption of trouble
contagion · herd immunity · SARS-CoV-2 · epidemic · spread · viral load · superspreader · exponential growth · contact tracing · lockdown
ratio
Comparative numerical relation
- averageArithmetic mean or ordinary
- secondary infectionsPathogens exploiting compromised hosts
- modelingSimulating or demonstrating form
estimate · variable · parameter · formula · projection · forecast · simulation · statistical · data · metric
R-numbermortality rate
Deaths per population measured
case fatality rate · death toll · disease severity · virulence · lethality
R-numbercase fatality rate
Deaths divided by diagnoses
mortality rate · survival rate · death rate · incubation period
number, numbers, numbered, numbering, numberless, numeral, numerals, numerate, numeration