Moderna Inc. (Nasdaq: MRNA US) said it has signed vaccine purchase agreements worth $18.5 billion for this year, along with options for another $3.5 billion, including booster shots. In a statement on Monday, the company also said 2021 product sales would be $17.5 billion, slightly higher than the average analyst estimates of $17 billion, according to data compiled by Bloomberg. Additionally, the company said that it shipped 807 million vaccine doses in 2021. Previously, it had said it would deliver between 700 million and 800 million doses.