China approved its first COVID-19 vaccine for general public use on Thursday, a shot developed by an affiliate of state-backed pharmaceutical giant Sinopharm, as it braces for greater transmission risks over the winter.

No detailed efficacy data of the vaccine has been publicly released but its developer, Beijing Biological Products Institute, a unit of Sinopharm subsidiary China National Biotec Group (CNBG), said on Wednesday its vaccine was 79.34% effective in preventing people from developing the disease based on interim data.

The approval, announced by the National Medical Products Administration, comes after the United Arab Emirates this month became the first country to roll out the vaccine to the public, and as Pakistan announced a 1.2 million dose purchase deal with Sinopharm.

While China has been slower than several other countries in approving COVID-19 vaccines, it has been inoculating some citizens for months with three different shots still undergoing late-stage trials.

China launched an emergency use programme in July aimed at essential workers and others at high risk of infection, had administered more than 4.5 million doses as of Dec 15 using at least three different products – two developed by CNBG and one by Sinovac Biotech.

While the efficacy of the Sinopharm shot trails the more than 90% success rate of rival vaccines from Pfizer Inc and its partner BioNTech SE and Moderna Inc, it points to progress China has made in the global race to develop successful COVID-19 vaccines.