Noubar Afeyan’s Moderna Inc said on Wednesday its experimental COVID-19 vaccine induced immune responses in older adults similar to those in younger participants, offering hope that it will be effective in people considered to be at high risk for severe complications from the coronavirus, Reuters reports.

The latest data from an early Phase I study includes an analysis from 20 additional people detailing how the vaccine performed in older adults.

The analysis looked at subjects given the 100-microgram dose being tested in the much larger Phase III trial. Moderna said the immune responses in those aged between ages 56 and 70, above age 70 and those 18 to 55-years-old were similar.

Moderna, which has never brought a vaccine to market, has received nearly $1 billion from the U.S. government under its Operation Warp Speed program. It has also struck a $1.5 billion supply agreement with the United States.