Vials of investigational coronavirus disease (COVID-19) treatment drug remdesivir are capped at a Gilead Sciences facility in La Verne, California, U.S. March 18, 2020. Picture taken March 18, 2020.

Gilead Sciences said Thursday that it can produce "several million" rounds of its antiviral drug remdesivir next year to help patients fight the coronavirus.

The company expects to produce more than 140,000 rounds of its 10-day treatment regimen by the end of May and anticipates it can make 1 million rounds by the end of this year.

"Our focus at this time is on both our work with remdesivir and our ongoing commitments to the people who depend on our medicines today," Gilead CEO Daniel O'Day said in the company's first-quarter earnings release.

On Wednesday, Gilead released preliminary results from its clinical trial on remdesivir, showing at least 50% of the patients treated with a five-day dosage of the drug improved. The clinical trial involved 397 patients with severe cases of Covid-19. The severe study is "single-arm," meaning it did not evaluate the drug against a control group of patients who didn't receive the drug.