B2 adjective Neutral

contagious

/kənˈteɪ.dʒəs/

Describes a disease that is spread from one person or organism to another by direct or indirect contact. It is also used figuratively to describe an emotion, feeling, or attitude that spreads quickly among a group of people.

Examples

3 of 5
1

The doctor warned that the flu remains contagious for several days after the fever breaks.

The physician advised that the virus can still spread to others for a few days after the high temperature stops.

2

Public health officials are monitoring the outbreak of several highly contagious respiratory infections.

Government health authorities are tracking the sudden appearance of many easily spread lung diseases.

3

Stay away from me today; I've got a nasty cold and I'm probably contagious.

Don't get too close because I am sick and likely to pass the germs to you.

Word Family

Noun
contagiousness
Adverb
contagiously
Adjective
contagious
Related
contagion
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Memory Tip

Think of the 'CON' in contagious as standing for 'Contact'. If you have contact with someone, the feeling or germ spreads.

Quick Quiz

The toddler was sent home from daycare because his skin rash was considered _______.

Correct!

The correct answer is: contagious

Examples

1

The doctor warned that the flu remains contagious for several days after the fever breaks.

everyday

The physician advised that the virus can still spread to others for a few days after the high temperature stops.

2

Public health officials are monitoring the outbreak of several highly contagious respiratory infections.

formal

Government health authorities are tracking the sudden appearance of many easily spread lung diseases.

3

Stay away from me today; I've got a nasty cold and I'm probably contagious.

informal

Don't get too close because I am sick and likely to pass the germs to you.

4

Sociologists have long studied the contagious nature of panic within crowded environments.

academic

Researchers of society have investigated how fear spreads like a virus among people in packed spaces.

5

The CEO’s contagious optimism helped the company navigate through the financial crisis.

business

The leader's positive attitude spread to everyone else and helped the firm survive the money problems.

Word Family

Noun
contagiousness
Adverb
contagiously
Adjective
contagious
Related
contagion

Common Collocations

highly contagious spreads very easily to others
contagious disease an illness that passes through contact
contagious laughter laughter that makes everyone else laugh
contagious enthusiasm excitement that spreads to other people
contagious yawning the phenomenon where seeing a yawn makes you yawn

Common Phrases

contagious smile

a smile that makes others want to smile too

social contagion

the spread of behaviors or attitudes through a group

emotional contagion

automatically mimicking the emotions of others

Often Confused With

contagious vs infectious

Infectious refers to any disease caused by germs, while contagious specifically means it spreads through contact with a person or object.

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Usage Notes

While originally a medical term, 'contagious' is frequently used in a positive sense to describe emotions like 'joy' or 'enthusiasm' in everyday conversation.

⚠️

Common Mistakes

Learners often use 'contagious' only for bad things (diseases), but in English, it is very common to use it for positive emotions like laughter or energy.

💡

Memory Tip

Think of the 'CON' in contagious as standing for 'Contact'. If you have contact with someone, the feeling or germ spreads.

📖

Word Origin

From the Latin 'contagio', which comes from 'con-' (together) and 'tangere' (to touch).

Grammar Patterns

Used as an adjective after 'to be' Can be followed by a noun Modified by adverbs like 'highly' or 'extremely'
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Cultural Context

In Western psychology, 'contagious yawning' is often discussed as a sign of social empathy and bonding.

Quick Quiz

The toddler was sent home from daycare because his skin rash was considered _______.

Correct!

The correct answer is: contagious

Related Words

example

A1

An example is a specific thing or person that shows what a group or a rule is like. It is used to help explain something more clearly so that others can understand it easily.

always

A1

This word describes something that happens at all times or on every occasion. It is a frequency adverb used to talk about habits, permanent truths, or repeated actions.

result

A1

A result is something that happens or exists because of something else that happened before. It is often used to describe the final score of a game, the grade on a test, or the outcome of a specific action.

reason

A1

A reason is a cause or explanation for why something happens or why someone does something. It is the information that answers the question 'Why?'.

research

A1

A detailed study of a subject, especially in order to discover (new) information or reach a (new) understanding. It involves gathering facts and data to test a theory or solve a problem.

girl

A1

A female child or a young female person from birth until she reaches adulthood. It is also commonly used to refer to a daughter or, in informal settings, to a young woman.

food

A1

Food refers to any substance consumed by living organisms to provide nutritional support for the body. It can be of plant, animal, or fungal origin and contains essential nutrients like carbohydrates, fats, and proteins.

moment

A1

A very short period of time or a specific point in time. It is often used to ask someone to wait briefly or to describe a significant event occurring right now.

himself

A1

A reflexive pronoun used as the object of a verb or preposition when the subject is a male person or animal previously mentioned. It is also used to emphasize that a specific man or boy did something personally or without help.

force

A1

Force is the physical strength or energy that is used to push or pull an object. It can also refer to an organized group of people, such as the police or a military group.

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