The pandemic is sweeping through India at a pace that has staggered scientists. ‘Ripple in a bathtub’COVID-19 case numbers started to drop in India last September, after a high of around 100,000 daily infections. The studies also suggested that, nationally, some 271 million people had been infected — about one-fifth of India’s population of 1.4 billion. Mixing, moving and travellingSome say that emerging variants account for only a small part of India’s surge in infections. But that’s less than 10% of India’s population, so there is still a long way to go.