Saliva antigen tests for COVID-19

Our KnowNowᵀᴹ tests are a UK made infectiousness test for COVID-19. They work with patented technology to deliver true infectiousness results in under 15 minutes with just a saliva sample.
Works in 15 minutes

Know if you are currently infectious with COVID-19 in under 15 minutes with no other epuipment.

Accurate and sensitive

Our unique approach makes our test both accurate and sensitive, both in the lab or in the real-world.


Designed for scale our tests are easy to administer accurately and painless to receive.

True infectiousness test

Our tests only detect people with an active, infectious COVID-19 infection.

Equipment free

Can be used anywhere with no other equipment. The most accessible platform to house our assay technology.

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Had COVID - 19 symptoms in the last 2 days? Apply here to help us make testing accessible to all.

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Try KnowNow testing with a
free sample pack.

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