LIBBY GEORGE and ALEXIS AKWAGYIRAM  THE Lagos businesswoman recalled the "horrendous" week she spent in the COVID-19 wing of a city public hospital, where the sense of crisis was lifted only briefly by whoops of joy when a patient secured one of the few available tanks of oxygen. "There was a shortage," the 47-year-old, who did not wish to be named in order to protect the staff who struggled to treat her, told Reuters. "It was discussed all around. It felt like that was the main issue – oxygen, oxygen, oxygen," she said, convalescing in a private hospital to which…