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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. The Delta variant was named on 31 May 2021 and had spread to over 179 countries by 22 November 2021.
Still, those who have healthy immune systems and have previously been vaccinated or infected are less likely to experience the more severe cases of COVID-19 that result in hospitalization or death.
The United States will not lift any existing travel restrictions "at this point" due to concerns over the highly transmissible COVID-19 Delta variant and the rising number of U.S. coronavirus ...
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 ...
While the alpha and beta genera are derived from the bat viral gene pool, the gamma and delta genera are derived from the avian and pig viral gene pools. [1] Recombination appears to be common among deltacoronaviruses. [2] Recombination occurs frequently in the viral genome region that encodes the host receptor binding protein.
The (COVID-19) pandemic has put a tremendous strain on many countries' citizens, resources, and economies around the world. [3] This includes the social distancing measures, travel bans, self-quarantines, and business closures are changing the very fabric of societies worldwide. [ 3 ]
COVID-19 is still highly contagious, but the severity of the symptoms have lessened for most people because of the differences in the variants and the immunity people have built up by vaccination ...
WHO announces that "Of 899,935 Covid-19 test samples sequenced and uploaded to the global Covid database in the last 60 days, 897,886 (99.8%) were confirmed to be Delta, while 713 (0.1%) were Omicron." Cases in South Africa rise by 110% in one week. [90] Cuba reports its first case, in a person who had traveled from Mozambique. [91]