Rajiv Nath, who heads India's largest syringe factory, says he is turning down as many as 40 requests for syringes from across the world.
Mr Nath's Hindustan Syringes & Medical Devices (HMD) is in huge demand now as countries try to ramp up vaccination against Covid-19.
The factory is currently producing some four million syringes a day but Mr Nath says that's still not enough given that the world needs 10 billion syringes to vaccinate just 60 per cent of its population.
He hopes that better coordination between the WHO, governments and syringe makers will smooth the way going forward.