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A COVID-19 vaccine is intended to provide acquired immunity against severe acute respiratory syndrome coronavirus 2 (SARS‑CoV‑2), the virus that causes coronavirus disease 2019 . Prior to the COVID-19 pandemic, an established body of knowledge existed about the structure and function of coronaviruses causing diseases like severe acute ...
The CDC estimates that 40% of people infected never show symptoms (i.e. are asymptomatic), [98] although there is a 75% chance they can still spread the disease. And while children have a lower risk of becoming ill or dying, the CDC warns that they can still function as asymptomatic carriers and transmit the virus to adults. [98]
The COVID-19 pandemic ranks as the deadliest disaster in the country's history. [43] It was the third-leading cause of death in the U.S. in 2020, behind heart disease and cancer. [ 44 ] From 2019 to 2020, U.S. life expectancy dropped by three years for Hispanic and Latino Americans , 2.9 years for African Americans , and 1.2 years for white ...
The COVID-19 vaccination campaign in the United States is an ongoing mass immunization campaign for the COVID-19 pandemic in the United States.The Food and Drug Administration (FDA) first granted emergency use authorization to the Pfizer–BioNTech vaccine on December 10, 2020, [7] and mass vaccinations began four days later.
Percent of people of all ages who received all doses prescribed by the initial COVID-19 vaccination protocol. Two of the three COVID-19 vaccines used in the U.S. require two shots to be fully vaccinated. The other vaccine requires only one shot. Booster doses are recommended too. [2] [3] See Commons source for date of last upload.
Experts say the updated COVID-19 vaccines rolled out in September still offer protection against newer strains, including HV.1 and JN.1, but uptake has been low so far. COVID-19 cases and ...
For ten years, Americans have had access to flu shots that protect against four different strains of the flu—two A strains and two B strains. Starting this fall, however, all the flu shots ...
The timeline of the COVID-19 pandemic lists the articles containing the chronology and epidemiology of SARS-CoV-2, [1] the virus that causes the coronavirus disease 2019 and is responsible for the COVID-19 pandemic. The first human cases of COVID-19 occurred in Wuhan, People's Republic of China, on or about 17 November 2019. [2]