Moderna’s coronavirus vaccine found to be nearly 95 percent effective in a preliminary analysis

Biotechnology firm Moderna announced Monday that a preliminary analysis shows its experimental coronavirus vaccine is nearly 95 percent effective at preventing illness, including severe cases — a striking initial result that leaves the United States with the prospect that two coronavirus vaccines could be available on a limited basis by the end of the year.

The news comes a week after pharmaceutical giant Pfizer and its German partner BioNTech lifted the stock market and people’s hopes with the news that their coronavirus vaccine was more than 90 percent effective.

Based...