Pune: Stocks of Oxford COVID-19 vaccine, Covishield, are likely to start moving out of Serum Institute of India's facility here on early Tuesday morning, days ahead of the nationwide inoculation drive, marking India's entry into a decisive phase against the anti-coronavirus fight.A source closely involved in logistical arrangements said the movement of vaccine doses is likely to start from early Tuesday morning through road and air routes amid elaborate police security."Some consignments will go by roadways and some will go by air," said the source.Trucks belonging to Kool-ex Cold Chain Ltd, which will be ferrying vaccine stocks, reached Serum Institute of India's (SII) Manjari facility on Monday evening, where loading of doses will take.