SARS-CoV-2 Delta variant, SEM
SARS-CoV-2 Delta variant. Coloured scanning electron micrograph (SEM). Here the delta variant is shown budding (blue dots) from a Vero mammalian kidney epithelial cell 24 hours after infection. Some of the spike proteins are highlighted in cyan. SARS-CoV-2 Delta variant took over globally from the alpha variant in 2021. The delta variant has evolved to better replicate in its new human host allowing it to spread between people more efficiently. The coronaviruses take their name from their crown (corona) of surface proteins, which are used to attach and penetrate their host cells. As of mid-September 2021 226, 130, 821 cases and 4, 653, 230 deaths have been recorded world- wide. Magnification x 40000 at 10cm wide. Specimen courtesy of Greg Towers, UCL
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Photo credit: © STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
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