J&J Seeks India's Permission For Phase 3 Trial Of 1-Shot Vaccine: Report Johnson & Johnson's vaccine is a single-dose jab, whereas the three vaccines cleared by India so far are of doubles doses. Updated: April 20, 2021 12:24 am IST The J&J vaccine can be stored for up to three months in a temperature between 2 and 8 degrees Celsius. New Delhi: Multinational pharma giant Johnson & Johnson has applied to India's drug regulator seeking permission to conduct phase-3 clinical trial of its single-dose COVID-19 vaccine in India as well as import licence, sources said. They said the company has sought an early meeting of the subject expert committee on COVID-19 of the Central Drugs Standard Control Organisation (CDSCO) to take a decision on its application.