New Delhi: Seeking a fast-track approval for its COVID-19 vaccine, US major Pfizer has told Indian authorities that its jab has shown "high effectiveness" against the SARS-CoV-2 variant prevalent in India and on people of Indian ethnicity or nationality, while it is suitable for everyone aged 12 years or above and can be stored for a month at 2-8 degrees, sources said on Wednesday.Pfizer, which is ready to offer 5 crore doses to India between July and October this year and has sought certain relaxations including indemnification, has held a series of interactions with the Indian government authorities recently including one this week, during which it shared the most recent data points regarding efficacy trials and approvals for its vaccine.