How rapid tests work and why timing is critical | CBC
2021-7-2 · You should do a rapid test twice a week (every 3 to 4 days) to check if you have the virus. If people test positive and self-isolate, it helps stop the virus spreading. Even if you’re vaccinated, there’s still a chance you can pass COVID-19 on, so you should keep getting tested regularly. About rapid tests
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