A close up of a test kit for testing for the coronavirus, Covid-19 is seen at Newton-Wellesley Hospital in Newton, Massachusetts on March 18, 2020, as the hospital has set up three tents in the parking garage where patients who have been pre-screened can show up for testing.

Gilead Sciences has temporarily stopped granting patients access to remdesivir, its experimental drug against the novel coronavirus that causes COVID-19, citing "overwhelming demand," the company said Sunday.

The company said in a statement that it is focused on processing previously approved requests, and that it is developing a new system that it says will allow patients to get the drug in a similar time frame to what it would have taken to work through the requests it has received.