Beijing's Xicheng district started providing inhalable COVID-19 vaccines on Thursday, with appointments available online, according to a report by Beijing Business Today.

Advance appointments can be made through a mini-program on WeChat that was launched by health authorities of the district.

Appointments for the weeks of Nov 16 and 23 are already fully booked.

Some other places in the country are also providing inhalable vaccines, including Tianjin, Shanghai and a dozen cities in Jiangsu province, according to CanSinoBIO, a producer of the vaccines.