Key to the scramble is a renewed vaccination push and efforts to boost India's medical infrastructure to stockpile supplies, such as oxygen cylinders, and augment care networks from city slums to far-flung villages. India's vaccine makers, particularly the Serum Institute, are under pressure to enhance production to service the urgent domestic need even as the world waits for exports from the country to resume. Ishant Chauhan/AP A health worker cheers 7-year-old boy Rudra Singh, and his family members who have recovered from Covid-19 as they prepare to leave an isolation centre. Failure could be brutal. India is reeling from a pandemic punch that brought staggering official daily death tolls of more than 4500 at its peak in mid-May. At present, just 3.5 per cent of India's more than 1.3 billion people are fully vaccinated.