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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.
While all eyes are on the new and little-understood omicron variant that is popping up around the country, the delta form of the coronavirus isn't finished wreaking havoc in the U.S., swamping ...
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 ...
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.
COVID-19 endemicity is distinct from the COVID-19 public health emergency of international concern, which was ended by the World Health Organization on 5 May 2023. [6] Some politicians and commentators have conflated what they termed endemic COVID-19 with the lifting of public health restrictions or a comforting return to pre-pandemic normality.
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 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 organization still had reservations, though, and cautioned that mask use by the general public was still "not yet supported by high quality or direct scientific evidence". [99] On 8 June, the WHO warned that the COVID-19 pandemic was worsening globally, with more than 136,000 cases recorded on 7 June, the highest ever in a single day. [100]