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Analysis: Super contagious Delta variant has public health experts worried
Delta is considered to be at least 30 per cent more transmissible than Alpha, the predominant variant currently.
Delta is considered to be at least 30 per cent more transmissible than Alpha. An analysis of nearly 39,000 sequenced cases in England found that Delta was associated with a 2.61 times higher risk of hospitalization than Alpha.
A study by Public Health England determined that the Pfizer-BioNTech vaccine when administered as two doses was 88 per cent effective against Delta compared with 93 per cent against Alpha. Two doses of the AstraZeneca vaccine were found to be 60 per cent effective against Delta.
And in a research letter published in the Lancet medical journal on Thursday, British scientists recommended that people who are most vulnerable to severe COVID-19 complications receive a booster shot in addition to the two doses for effective protection against Delta.
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