Covishield Works Against COVID-19 Delta Variant??
According to a new study published in the Lancet, the Covishield vaccine was effective against coronavirus during the Delta variant outbreak in India earlier this year. In fully vaccinated people, Covishield had a 63 percent efficiency rate, while it was 81 percent effective against moderate-to-severe sickness.
The study was conducted by the Indian scientists and it was led by the Translational Health Science and Technology Institute (THSTI) to know the effectiveness of Covishield during the SARS-CoV-2 infection surge between April and May 2021
“The rise in mutant variants of SARS-CoV-2 virus has led to concerns regarding vaccine effectiveness. The Delta (B.1.617.2) variant is the predominant strain in India,” the Ministry of Science & Technology said in a statement.
“The ChAdOx1 nCoV-19 vaccine remained effective against moderate-to-severe COVID-19, even during a surge that was dominated by the highly transmissible delta variant of SARS-CoV-2,” the paper concluded.
To better understand the mechanisms of protection, they tested neutralising activity and cellular immune responses against the variants in healthy vaccinated people. The Spike-specific T-cell responses were shown to be preserved against both the delta variant and wild-type SARS-CoV-2, according to the researchers.
“This study provides comprehensive data on the real-world vaccine effectiveness and immunological response to vaccination which should help guide policy,” the Ministry added.