The Different Covid-19 Tests and What They Can Reveal

Even with Covid-19 vaccines scaling up, testing remains a crucial tool for bringing the pandemic under control — and keeping it that way. While the challenge in 2020 was to develop and increase supplies of SARS-CoV-2 tests, this year health officials are looking to use these tools more often and in new ways to help get life back to normal as fast as possible. Testing is needed to track where SARS-CoV-2 is flaring up, identify variants that could pose a greater risk, and gauge the immunity of in

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