covid-19 patients amidst shortage of hospital beds, testing equipment, oxygen and medicines, the World Health Organization (WHO) said that it is procuring mobile field hospitals with capacity of 20-30 beds, which could be set up in the most affected areas.The bed capacity at these field hospitals can be increased to a maximum of 50, if needed, without impacting infection prevention and control protocols, and water and sanitation, the WHO said.With daily reports of people dying in hospitals without oxygen, the WHO is also chartering flights to bring in 4,000 oxygen concentrators to help meet the increased demands.The apex global public health agency said that it is filling critical gaps in essential medical supplies and hospital capacities.