Pneumonia leaves an estimated 4.2 million under-fives in 124 low- and middle-income countries with critically low oxygen levels.
The situation could become even more serious as a result of health service disruptions caused by the coronavirus pandemic.
Despite the facts, many people don't realise just how deadly pneumonia is for young children.
It's not only a disease that affects the elderly, but one which stalks young children in developing countries.
Help us raise awareness