Indonesia began testing a homegrown Covid-19 vaccine on humans Wednesday after getting the green light from the drug regulator as the country faces a rising wave of virus cases.

Research on the “Merah Putih” (“Red White“) vaccine — named after the colors of the Indonesian national flag — is led by Airlangga University and Biotis Pharmaceutical Indonesia.

Health minister Budi Gunadi Sadikin said the drug, set to be rolled out in the latter stages of Indonesia’s vaccination campaign, could be donated to other nations, as a booster jab or as a vaccine for children aged three to six.

“I have discussed this matter with the president and he has agreed to use this vaccine as a donation to countries in need,” Sadikin said Wednesday at a launch event for the human trials in Surabaya.

The first and second phases of the clinical trials will involve 90 and 405 adult volunteers respectively.

The Merah Putih vaccine has been granted a “halal” certification from the Indonesian Ulema Council, the Muslim majority nation’s top religious clerics body, according to the dean of Airlangga University Mohammad Nasih.

“We hope with this halal certification, the public confidence to use this vaccine will be higher,” Nasih told reporters.

Indonesia has approved 13 vaccines and boosters but has primarily used the Chinese-made jabs, and has struggled to procure enough doses for its population of more than 270 million people.