Term:Asymptomatic

Normative

Definition

An asymptomatic case is a person infected with SARS-CoV-2 who does not develop symptoms (15,16).

Source: https://apps.who.int/iris/bitstream/handle/10665/338882/WHO-2019-nCoV-clinical-2021.1-eng.pdf

Encyclopaedic information

One systematic review of 79 studies found that 20% (17–25%) of people remained asymptomatic throughout the course of infection (20).

Source: https://apps.who.int/iris/bitstream/handle/10665/338882/WHO-2019-nCoV-clinical-2021.1-eng.pdf

Examples

It is unclear what percentage of individuals who present with asymptomatic infection progress to clinical disease.

Source: https://files.covid19treatmentguidelines.nih.gov/guidelines/covid19treatmentguidelines.pdf

Collocations

• asymptomatic and presymptomatic
• asymptomatic and symptomatic
• asymptomatic case
• asymptomatic infection

Keyness

157

Research

Definition/description

The spectrum of clinical illness ranges from asymptomatic illness to a severe acute respiratory disease requiring intensive care and mechanical ventilation.

Source: https://www.thelancet.com/journals/laninf/article/PIIS1473-3099(18)30002-1/fulltext

Examples

It tells us that quickly finding and isolating exposed and asymptomatic cases can effectively control the spread of epidemic.

Source: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0144778

Substantial undocumented infections by asymptomatic but infected individuals may explain the rapid geographic spread of COVID-19.

Source: https://www.internationaljournalofcardiology.com/article/S0167-5273(20)31593-X/fulltext

Collocations

• asymptomatic individual, person
• asymptomatic case, patient
• to be asymptomatic
• to appear asymptomatic
• to remain asymptomatic

Keyness

250

Press

Examples

Most children who contract COVID-19 either have mild cases or are asymptomatic, not tending to get seriously ill or to die.

Source: https://www.dailymail.co.uk/news/article-10056123/COVID-vaccine-mandate-takes-effect-NYC-teachers-staff.html

By two doses, asymptomatic infections were down 70 per cent and symptomatic by 90 per cent.

Source: https://www.telegraph.co.uk/news/2021/04/22/covid-pandemic-britain/

Keyness

218

Comments

Examples

Her husband who tested positive was asymptomatic.

Source: https://www.dailymail.co.uk/news/article-10288731/Allegra-Stratton-QUITS-Number-10-Christmas-party-video.html

Collocations

• asymptomatic case

Keyness

786