Legendary sprinter Milkha Singh has shown continuous improvement after being treated for Covid-19 at Chandigarh's PGI hospital.<br />'' <br />''The 91-year-old is being observed by a medical team comprising senior doctors of the institute.<br />'' <br />''<span style="color: #222222;">His wife Nirmal Kaur is battling with the coronavirus in another local private hospital.</span><br />