Pfizer Inc said on Tuesday that it expects revenue of about $15 billion from the sale of Covid-19 vaccine in 2021. Pfizer is manufacturing anti-coronavirus shots along with German partner BioNTech.The company said the total sales in the year are expected to be between $59.4 billion and $61.4 billion.Pfizer vaccine was among the first to be authorized for emergency use in the United States and several other countries, and analysts have forecast billions in sales.In the fourth quarter, the vaccine brought in sales of $154 million, below expectations of $462 million, according to consensus estimates compiled by brokerage Mizuho.The company now expects full-year adjusted earnings of $3.10 to $3.20 per share, up from its prior forecast of $3 to.