The deadly fire in an upcoming production facility at the Serum Institute of India (SII), in Pune has sent shock waves because of the key role played by the company in producing the Oxford-AstraZeneca Covishield COVID-19 vaccine. Five workers engaged in construction have perished, and there are indications that expensive equipment has been destroyed. There is understandable concern about the accident at the SII building, which is located away from the Covishield unit, as the company, reputedly the world's biggest vaccine manufacturer, is now an institution of global importance. It is scheduled to deliver several hundred million doses of Covishield to a host of countries, including less affluent nations depending on the COVAX initiative led by WHO to protect their populations and move towards normality. Such a position of indispensability for the Pune facility in the war against the pandemic casts upon India, Maharashtra and SII, the responsibility of ring-fencing vaccine production against all threats, including the one that normally gets low importance in India, which is fire safety. The initial assessment indicates that Thursday's blaze may have been triggered by flammable materials set afire by sparks generated during construction work, trapping and asphyxiating workers. It is welcome that the company has offered a solatium to the families of the victims, who included migrants from Uttar Pradesh and Bihar, but the bigger task is to convince the world that critical vaccine supplies are not jeopardised by lax safety protocols.