Starting twice daily flushing of the nasal cavity with a mild saline solution soon after testing positive for Covid-19 may reduce hospitalisation due to the viral disease, a study claims. The technique involves mixing a half teaspoon each of salt and baking soda in a cup of boiled water and then putting it into a sinus rinse bottle, making it a safe, effective and inexpensive way that can have a vital public health impact. Stay with TOI for latest updates on Covid in India and across the world: