New Delhi: Rare, life-threatening COVID-19 complications appear to be escalating in India, creating a fresh wave of critical medical challenges in a country that has already seen short supplies of oxygen and other basic needs. Pharmacists are warning of a shortage of a crucial drug to treat an invasive fungal infection preying on patients with weakened immune systems and diabetes. An uptick in cases across India of a dangerous inflammatory syndrome in children - also seen in the US and Europe at the height of their outbreaks - is a harbinger of a potentially deadly spate of the paediatric illness in the coming weeks.