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nbsp;In an update to the school community sent to Fox News, LAUSD Superintendent Austin Beutner said, "As difficult as the decision was to close school classrooms, reopening is even harder. fd 135 2.5 According to the latest data from Johns Hopkins University, COVID-19 has infected more than 28 million Americans since March 2020, and has resulted in more than 498,000 related deaths. fd 135 2.5 The WHO plays a crucial role in the world’s fight against the deadly COVID-19 pandemic as well as countless other threats to global health and health security," Biden said in a letter to U. fd 135 2.5 strain, the mutations in the Columbus strain are likely to make the virus more infectious, making it easier for the virus to pass from person to person," according to university researchers. fd 135 2.5