NEW DELHI : Amid a surge in COVID-19 cases in Delhi, Chief Minister Arvind Kejriwal has directed authorities to increase the number of ICU beds in hospitals and take steps to contain the spread of the infection, Health Minister Satyendar Jain said on Thursday.Interacting with reporters, he also said plasma therapy will continue to be used in Delhi as it is proving to be effective in people who are in stage one or two of COVID-19 treatment, but not in stage three or those on ventilators.He told this to mediapersons when asked to respond about an Indian Council of Medical Research-funded study which has found that use of convalescent plasma therapy in coronavirus-infected patients does not help in reducing mortality or progression to severe.