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The Delta variant (B.1.617.2) was [3] [4] a variant of SARS-CoV-2, the virus that causes COVID-19. It was first detected in India on 5 October 2020. It was first detected in India on 5 October 2020. The Delta variant was named on 31 May 2021 and had spread to over 179 countries by 22 November 2021.
Pneumococcal pneumonia kills about 1 in 20 older adults infected with the bacteria, according to the CDC. ... The CDC reported that KP.3.1.1 was the dominant COVID-19 variant circulating the U.S ...
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]
A study of samples collected in Manaus between November 2020 and January 2021, indicated that the Gamma variant is 1.4–2.2 times more transmissible and was shown to be capable of evading 25–61% of inherited immunity from previous coronavirus diseases, leading to the possibility of reinfection after recovery from an earlier COVID-19 ...
The continued spread of the SARS-CoV-2 virus has spawned a Greek alphabet of variants - a naming system used by the World Health Organization to track concerning new mutations of the virus that ...
About 12.5 percent of men with life-threatening Covid-19 pneumonia had autoantibodies against interferon, compared with 2.6 percent of women. That was unexpected, given that autoimmune disease is ...
On 29 December, the US joined Italy, Japan, Taiwan and India in requiring negative COVID-19 test results from all people travelling from China due to the new surge in cases. The EU refused similar measures, stating that the BF7 omicron variant had already spread throughout Europe without becoming dominant. [252] [253]
Deltacoronavirus (Delta-CoV) is one of the four genera (Alpha-, Beta-, Gamma-, and Delta-) of coronaviruses. It is in the subfamily Orthocoronavirinae of the family Coronaviridae. They are enveloped, positive-sense, single-stranded RNA viruses. Deltacoronaviruses infect mostly birds and some mammals.