Omicron

Omicron is the 15th letter of the Greek alphabet. In the system of Greek numerals it has a value of 70. This letter is derived from the Phoenician letter ayin. In classical Greek, omicron represented the sound [o] in contrast to omega [ɔː] and ου [oː]. In modern Greek, omicron represents the mid back rounded vowel /o̞/, the same sound as omega. Letters that arose from omicron include Roman O and Cyrillic O.

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People who catch Omicron are less likely to get Long Covid

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A meta-analysis of 65 studies finds that prior COVID-19 infection confers substantial protection against pre-omicron variants, but not Omicron BA.1. Regardless, the authors conclude the level of protection from past infections is equal to, if not greater than, that provided by two-dose mRNA vaccines

Omicron subvariant XBB.1.5 appears to be a ‘vaccine breaker’ — New variant of the novel coronavirus now makes up more than half of U.S. COVID-19 cases, and is on track to be the country’s most dominant strain (30 Jan. 2023)

Covid Vaccines Targeting Omicron Should Be Standard, Panel Says

Omicron caused fewer cases of MIS-C in children than delta and they were milder, says new study based on 2021-22 data

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COVID-19 vaccines, prior infection reduce transmission of Omicron

Breakthrough! Receptor “Decoy” Drug Neutralizes COVID-19 Virus Including Omicron and Other Variants