India's use of less accurate coronavirus tests raise concerns

Health experts are concerned about the Indian government's decision to implement rapid tests - which screen for antigens, or viral proteins - as authorities ramp up coronavirus tests amid surging infections. India crossed the three-million-case milestone on Sunday, 17 days after it crossed the two-million mark. It is the worst-affected country in Asia, and third behind the United States and Brazil globally. In June, the world's second-most populous nation began using cheaper, faster, but less accurate tests to scale up testing - a strategy that the US is now considering.