A dense fog has enveloped much of the Indian capital of New Delhi and surrounding regions, impacting air and road travel. Hundreds of flights were delayed on Jan 3 after visibility dipped to zero. Forecasts show these conditions are likely to persist in the coming days, as Neha Poonia reports.
.jpg?itok=P6uVbI6q "CNA Explains: How bad is the HMPV situation in China and is it cause for concern?")