2021 — COVID-19 pandemic: The Centers for Disease Control and Prevention announces that the SARS-CoV-2 Alpha variant has become the dominant strain of COVID-19 in the United States.
On This Day - April 7
2021 — COVID-19 pandemic: The Centers for Disease Control and Prevention announces that the SARS-CoV-2 Alpha variant has become the dominant strain of COVID-19 in the United States.