JAKARTA, Indonesia — Two vaccines made by China’s Sinopharm appear to be safe and effective against COVID-19, according to a study published in a medical journal.

The report, published online in the Journal of the American Medical Association, concluded the two vaccines are about 73% and 78% effective, as Sinopharm has previously claimed.

Scientists have been waiting for more details about the two vaccines, even though they already are used in many countries and one recently won the backing of the World Health Organization.

Researchers from Sinopharm and its local partners in the Middle East say the trial involved 40,380 participants with the company’s two vaccines — one developed by the Wuhan Institute of Biological Products and the other by the Beijing Institute of Biological Products — and a placebo. The trial was carried out in Bahrain, the United Arab Emirates, Egypt and Jordan. However, the study provided data for just Bahrain and the UAE.

Health experts say there's not enough data in the study to show whether the vaccines provide protection against severe disease. The study also involved many more men than women, which means there is not enough data to determine if there are safety concerns that impact women.