New Delhi, Feb 26 PTI The COVID-19 vaccination sessions will not be held this Saturday and Sunday in view of the Co-Win digital platform transitioning from Co-Win 1.0 to Co-Win 2.0 as India gears up to inoculate people above 60 years and those over 45 years with comorbidities against the infection from March 1.All states and UTs have been already informed about this transition, the Union Health Ministry said.