New Delhi: The COVID-19 vaccine is likely to arrive in Delhi by early next week and robust preparations are underway to stock it in the required thermal environment and ensure effective roll-out of the inoculation exercise, sources said on Wednesday.The city government is creating a massive storage facility at the Rajiv Gandhi Super Speciality Hospital (RGSSH) and the police administration has been informed about the imminent arrival of the vaccine lot."We are making robust preparations for the roll-out, and 621 cold chain facilities have been set up.