The U.S. Food and Drug Administration has given the green light for emergency use of Regeneron’s COVID-19 antibody drug — the same treatment given to President Trump.

The treatment is aimed at those with mild cases of COVID-19, and not for those hospitalized as a result of the virus, the FDA said.

The treatment works by mimicking the body’s own immune system to prevent the infected from become severely ill.

Regeneron’s drug is a combination of two monoclonal antibodies. A similar drug developed by Eli Lilly & Co. gained FDA emergency clearance earlier this month.

However the Regeneron treatment may not be immediately widely available: the company has said it will have just 80,000 doses by the end of November.