Rajat Ahluwalia, 38, bruised and exhausted after standing in a kilometre-long queue in Delhi on Sunday, finally managed to secure a 10-litre oxygen cylinder for his ailing 65-year-old father. Mr Ahluwalia is one among an army of desperate relatives running from pillar to post in the national capital trying to find oxygen and medication for family members battling the COVID-19 virus in overflowing hospitals staffed by overworked doctors and medical professionals.