‡Suspected cases have not been confirmed by laboratory tests as being due to this strain, although some other strains may have been ruled out.
Weekly confirmed COVID-19 deathsMap of cumulative COVID-19 death rates by U.S. state[8]
On December 31, 2019, China announced the discovery of a cluster of pneumonia cases in Wuhan. The first American case was reported on January 20,[9] and Health and Human Services Secretary Alex Azar declared a public health emergency on January 31.[10] Restrictions were placed on flights arriving from China,[11][12] but the initial U.S. response to the pandemic was otherwise slow in terms of preparing the healthcare system, stopping other travel, and testing.[13][14][15][a][17] The first known American deaths occurred in February[18] and in late February President Donald Trump proposed allocating $2.5 billion to fight the outbreak. Instead, Congress approved $8.3 billion with only Senator Rand Paul and two House representatives (Andy Biggs and Ken Buck) voting against, and Trump signed the bill, the Coronavirus Preparedness and Response Supplemental Appropriations Act, 2020, on March 6.[19] Trump declared a national emergency on March 13.[20] The government also purchased large quantities of medical equipment, invoking the Defense Production Act of 1950 to assist.[21] By mid-April, disaster declarations were made by all states and territories as they all had increasing cases. A second wave of infections began in June, following relaxed restrictions in several states, leading to daily cases surpassing 60,000. By mid-October, a third surge of cases began; there were over 200,000 new daily cases during parts of December 2020 and January 2021.[22][23]
COVID-19 vaccines became available in December 2020, under emergency use, beginning the national vaccination program, with the first vaccine officially approved by the Food and Drug Administration (FDA) on August 23, 2021.[24] Studies have shown them to be highly protective against severe illness, hospitalization, and death. In comparison with fully vaccinated people, the CDC found that those who were unvaccinated were from 5 to nearly 30 times more likely to become either infected or hospitalized. There has nonetheless been some vaccine hesitancy for various reasons, although side effects are rare.[25][26] There were also numerous reports that unvaccinated COVID-19 patients strained the capacity of hospitals throughout the country, forcing many to turn away patients with life-threatening diseases.
A fourth rise in infections began in March 2021 amidst the rise of the Alpha variant, a more easily transmissible variant first detected in the United Kingdom. That was followed by a rise of the Delta variant, an even more infectious mutation first detected in India, leading to increased efforts to ensure safety. The January 2022 emergence of the Omicron variant, which was first discovered in South Africa, led to record highs in hospitalizations and cases in early 2022, with as many as 1.5 million new infections reported in a single day.[27] By the end of 2022, an estimated 77.5% of Americans had had COVID-19 at least once, according to the CDC.[28]
^COVID-19 Deaths per 100K. U.S. News & World Report. Run your cursor over the map to see the dates and data for each state. "The data on this page is courtesy of USAFacts – a nonprofit, nonpartisan civic initiative – and includes information from the Centers for Disease Control and Prevention and state and local health departments. See a detailed methodology at the USAFacts website."
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