As the country is witnessing an exponential surge in Covid-19 cases, Nodal Officer for Covid-19 at PGIMS Rohtak Dr Dhruv Chaudhary suggested wearing a double mask as it prevents the Covid infection by 85 per cent to 8 per cent. "I urge people to wear a mask to prevent the spread of infection, it is not a fashion statement," said Dr. Dhruv Chaudhary.