by Marlowe HOOD PARIS, France (AFP) — The Delta variant of the virus that causes Covid-19 doubles the risk of hospitalization compared to the Alpha variant it has supplanted as the dominant strain worldwide, researchers reported Saturday in The Lancet. Only 1.8 percent of the more than 43,000 Covid cases assessed in comparing the two variants were in patients who had been fully vaccinated. Three-quarters were completely unvaccinated, and 24 percent had only received one […]