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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. The World Health Organization (WHO) indicated in June 2021 that the Delta variant was ...
[23] [24] Other organisations such as the CDC in the United States typically define their variants of concern slightly differently; for example, the CDC de-escalated the Delta variant on 14 April 2022, [25] while the WHO did so on 7 June 2022. False-colour transmission electron micrograph of a B.1.1.7 variant coronavirus. The variant's ...
July 30, 2021 at 8:03 AM. July 30 (Reuters) - The U.S. Centers for Disease Control and Prevention (CDC) has described the Delta variant of the coronavirus as being as transmissible as chickenpox ...
The Delta variant, which previously ravaged India and the U.K., now accounts for an estimated 83% of new U.S. coronavirus cases in recent weeks. Furthermore, according to the CDC, those who are ...
The Delta variant is already the dominant strain of COVID-19 in the United States, according to data modeling done by the U.S. Centers for Disease Control and Prevention (CDC). According to the ...
On July 27, based on updated information for fully vaccinated people that new evidence on the Delta variant had provided, CDC added a recommendation for those people to wear a mask in public indoor settings in areas of substantial or high transmission. CDC also made other recommendations based on this information. [52]
Most reported Covid-19 deaths in the U.S. are still from the delta variant, not omicron, Dr. Rochelle Walensky, director of the CDC, said Wednesday.
The R 0 of the Delta variant, which became the dominant variant of COVID-19 in 2021, is substantially higher. Among five studies catalogued in October 2021, Delta's mean estimate R 0 was 5.08. [91] Visualisation of the basic reproduction number, R 0. Temperature is also a factor that affects the transmissibility of the virus.