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There is limited data on the Delta variant in SA, but vaccines remain effective 2 Jul 2021 The Covid-19 J&J and Pfizer vaccines remain effective in protecting against severe sickness and hospitalisation. (Photo by Michael Ciaglo/Getty Images) Despite concerns over the highly transmissible Delta variant of Covid-19, which has spread to 85 countries and has become the dominant strain in Gauteng province, the Johnson & Johnson and Pfizer vaccines remain effective, according to the limited data available.  The significant increase in Covid-19 infections in Gauteng has been largely driven by the Delta variant, the National Institute for Communicable Diseases (NICD) confirmed this week. 

South africaGroote schuurWestern capeUnited kingdomUniversity of cape townSouth africanWolfgang preiserOxford astrazenecaAlan christoffelsMarvin hsiaoJonny myersAfrican health products regulatory authorityNational institute for communicable diseasesStellenbosch universityAfrican national bioinformatics instituteNational institute