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Reducing the risk of long COVID includes staying up to date on the most recent COVID-19 vaccine, practicing good hygiene, maintaining clean indoor air, and physical distancing from people infected with a respiratory virus. [20] The Omicron variant became dominant in the U.S. in December 2021. Symptoms with the Omicron variant are less severe ...
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.
SARS-CoV-2 is the seventh known coronavirus to infect people, after 229E, NL63, OC43, HKU1, MERS-CoV, and the original SARS-CoV. [105] Like the SARS-related coronavirus implicated in the 2003 SARS outbreak, SARS‑CoV‑2 is a member of the subgenus Sarbecovirus (beta-CoV lineage B). [106] [107] Coronaviruses undergo frequent recombination. [108]
The CDC recommends people ages 12 and older get the new shots, which target the latest Omicron subvariants as well as the original coronavirus strain.
The FDA and CDC have approved new bivalent vaccines by Pfizer and Moderna that target both the original strain of COVID-19 and Omicron subvariants. New Omicron-targeting COVID-19 boosters are ...
On 18 December 2021, the Netherlands government announced a lockdown intended to prevent spread of the variant during the holiday period. [123] In December 2021, some countries shortened the typical six-month interval for a booster dose of the vaccine to prepare for a wave of Omicron, as two doses are not enough to stop the infection.
The Omicron variant of the coronavirus is spreading faster than the Delta variant and is causing infections in people already vaccinated or who have recovered from the COVID-19 disease, the head ...
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]
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