GENEVA, Switzerland (AFP) — The WHO said Tuesday that only one strain of the Covid-19 Delta variant first detected in India was now considered “of concern”, while two other strains had been downgraded. The B.1.617 variant of the virus, which has in part been blamed for India’s explosive outbreak, has been dubbed a triple mutant variant since it is split into three lineages. The UN health agency last month declared the entire strain a “variant […]