Sikkim is the only state in India that has not reported any coronavirus patients so far at a time when more than 18,000 people across the country have contracted the highly contagious illness, at least 590 have died. The state managed to achieve this feat by staying on alert ever since the county recorded its first case from Kerala in January and following a step-by-step approach to tackle COVID-19, Chief Minister Prem Singh Tamang has said.