It may not be completely clear to many people, but there is an important difference between isolation and quarantine. This animated video explains the difference.

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(Animation.)

VOICE-OVER: What is the difference between isolation and quarantine?
It may not be completely clear to many people, but there is an important difference between isolation and quarantine.
This animated video explains the difference.

You always go into isolation if you test positive, which means that it has been confirmed that you have COVID-19.
This will prevent you from infecting others.

You go into quarantine if you have been in contact with someone who has COVID-19, and therefore might be infected yourself, but are not sure yet.
This is a precaution to ensure that you do not continue to spread the virus, if you do turn out to be infected.
However, there are several exceptions.
Your situation determines whether you have to go into quarantine, and for how long.
Isolation and quarantine are also subject to different rules.

For more information, go to quarantainecheck.rijksoverheid.nl/en.