The COVID-19 pandemic presented an unprecedented public health challenge in the United States, marked by successive waves of infection, the emergence of new variants, and a dynamic public health response. From the first reported case in January 2020 to the end of 2022, the nation grappled with rising case numbers, hospitalizations, and deaths, alongside the rapid development and deployment of vaccines. This period saw significant shifts in public health guidance,
travel restrictions, and the overall societal impact of the virus, illustrating a continuous adaptation to an evolving threat.
Early Days and the First Surges of 2020
The first American case of COVID-19 was reported on January 20, 2020, prompting Health and Human Services Secretary Alex Azar to declare a public health emergency on January 31. Initial efforts focused on identifying and monitoring close contacts of confirmed patients, with the CDC activating its emergency operations center to support the response. Early testing efforts faced challenges, as the CDC's own coronavirus test was found to be defective, leading to delays as samples had to be sent to the CDC lab in Atlanta.
Despite early assurances from some officials that the risk to the American public remained low, the virus began to spread. By mid-October 2020, the U.S. experienced a third surge of cases, with daily new infections exceeding 200,000 during parts of December 2020 and January 2021. This period also marked a significant turning point with the availability of COVID-19 vaccines in December 2020 under emergency use authorization, initiating a national vaccination program.
The Rise of Variants and Continued Challenges in 2021
As 2021 began, the pandemic continued to evolve with the emergence of new, more transmissible variants. A fourth rise in infections started in March 2021, driven by the Alpha variant, which was first detected in the United Kingdom. This was soon followed by the Delta variant, an even more infectious mutation initially identified in India, which quickly became the dominant strain in the U.S. by July 7, 2021. By August, the Delta variant accounted for 99 percent of all cases and was found to double the risk of hospitalization for unvaccinated individuals.
Amidst these surges, vaccination efforts intensified. President Biden set a goal in May 2021 to have 70 percent of all adults receive at least one vaccine shot by July 4, though the country ultimately fell short, reaching 67 percent. Public health guidance also shifted, with the CDC changing its recommendations in May to state that fully vaccinated individuals did not need to wear masks in most situations. However, this guidance led to some confusion, as it did not immediately remove existing state and local mandates, and the federal mask mandate on public transportation remained in place. By June 15, the U.S. surpassed 600,000 deaths, though daily death numbers had decreased due to vaccination efforts. However, by mid-August, hospitals in states with low vaccination rates, particularly in the South, began to exceed capacity, with ICUs in several states reaching over 90% fullness.
Omicron's Impact and the Path Towards Normalization in 2022
The end of 2021 and the beginning of 2022 brought another significant challenge with the emergence of the Omicron variant, first discovered in South Africa. President Biden announced travel restrictions from South Africa and seven other African countries in November 2021 due to concerns over this new variant. The Omicron variant 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 in January. Fatality rates in the U.S. were notably higher than in other wealthy countries, partly attributed to lower vaccination rates.
Despite the Omicron surge, 2022 saw a gradual shift towards normalization. By April, COVID-19 numbers reached pandemic lows across the U.S., leading to the closure of many testing sites. The federal transportation mask mandate was ended nationwide in April by a U.S. District Judge, making masks optional on airplanes, buses, and subway systems, except where local mandates applied. The U.S. death toll reached 1 million by May 4, 2022, marking the largest recorded death toll in any single country. In June, the U.S. approved vaccines for children under five years of age and dropped COVID testing requirements for inbound international air travelers.
By September 2022, President Biden declared his belief that the pandemic was "over" in the United States, a statement that sparked debate within the medical community given the ongoing daily death toll. Nonetheless, the number of cases and COVID-attributed deaths in the latter half of 2022 showed a decrease compared to the same period in 2021. New variants like BQ.1 and BQ.1.1 emerged in October, and by the end of the year, the Omicron XBB.1.5 variant became much more prevalent, representing about 41% of new cases. Experts warned that the rise of subvariants could lead to a surge of breakthrough infections and re-infections, underscoring the continued need for vigilance and adaptation in the ongoing fight against COVID-19. By the end of 2022, an estimated 77.5% of Americans had experienced COVID-19 at least once, according to the CDC.
