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The New COVID-19 travel rules for Canada. A large number of health measures have been lifted over the last few weeks but some still remain for travellers returning to Canada from abroad. Starting today Monday February 28, 2022 travellers can now take rapid antigen test, which is cheaper than the PCR test and much more convenient as your results. MONTREAL -- Quebec will slightly expand its use of rapid COVID-19 tests, but experts advising the government warn that their use will be limited. During a briefing on Monday, a panel of experts. May 26, 2021 · Antigen tests are a method of detecting an active infection with SARS-CoV-2, the coronavirus that causes the illness COVID-19. These tests look for antigens, which are protein markers found on the outside of a SARS-CoV-2 virus. The test is performed on a sample that is taken by swabbing inside your nose..