Delta variant
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Omicron 'five times' more likely to reinfect than Delta, no milder: study
Variant associated with a 5.4-fold higher risk of reinfection compared with Delta, says Imperial College London study
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South Africa detects new Covid-19 variant, implications not yet clear
Scientists say 'B.1.1.529' variant has a 'very unusual constellation' of mutations
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'Germans will be vaccinated, cured or dead'
Health minister urges more citizens to get jabbed to avoid the deadly infection
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China's Covid-19 outbreak developing rapidly: report
Official says the virus control situation is severe and complicated
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Delta-plus: Offshoot of most deadly Covid variant on the rise in UK
PM Boris Johnson's spokesman says government was keeping a 'close eye' on the AY.4.2 variant
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Covid positivity rate falls below 3%
Single-day tally comes down to less than 1,500
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President's wife Samina Alvi tests positive for Covid-19
Samina says she is 'doing well' and only experiencing some weakness
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Delta variant's incubation period 'significantly' shorter: Chinese researchers
Variant can spread for 4 generations in 10 days, with fastest intergenerational transmission taking less than 24 hrs
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Delta variant proving deadlier
Report confirms drastically low Covid risk after vaccination
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No need for a vaccine third jab booster: study
The Lancet report concluded that booster doses are not appropriate at this stage despite Delta threat
