Practice: What year did the COVID-19 outbreak begin?
Subjects
Concept #1: COVID-19 (SARS-CoV-2)
Practice: What year did the COVID-19 outbreak begin?
Practice: SARS-Cov-2 virus (Covid-19) is a (+) ssRNA virus. Which of the following answers is true about SARS-Cov-2?
Practice: COVID-19 is a ___________ virus that causes _____________ infections.
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