prevalence
- 01 C1 Advanced
the fact that something is common or happens in many places.
the state or condition of being widespread or predominant in a particular area or at a particular time.
Simple“The prevalence of smartphones has changed how we communicate with our friends.”
In context“The prevalence of traditional folk motifs in modern architecture suggests a renewed interest in regional identity.”
UsageOften followed by the preposition 'of'.
- 02 C1 Advanced
the percentage of people in a group who have a specific disease or condition at one time.
the total number of cases of a disease in a given population at a specific time, usually expressed as a fraction or percentage.
Simple“Doctors are worried about the high prevalence of heart disease in the city.”
In context“Epidemiologists noted a significant increase in the prevalence of respiratory conditions among residents living near the industrial zone.”
UsageCommonly used in public health and statistical reporting.
PitfallThe prevalence of the flu increased by 5% last week. The incidence of the flu increased by 5% last week.Use 'prevalence' for the total number of cases at a specific time, but use 'incidence' for the rate of new cases appearing over time.
Usage report prevalence
“According to a study by the Australian National University , external , there's been a 32% increase in the prevalence of autism since the NDIS was introduced.”
“Nicholson said the prevalence of lithium-ion related incidents was down to "more people, more flights, more devices".”
Borrowed from Middle French prévalence.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.