Look at the figures. It is used in the US you haven't read the link, China and Russia don't need it.
In Australia AZ dominates their programm
The vaccination document, titled National vaccination allocation horizons, suggests in July and August AstraZeneca will continue to dominate the vaccination program, with up to 2.6m doses being administered each week, predominantly to those over the age of 60, through state and territory clinics and the primary care network.
Europe has used it and politics is involved.
Chatwin said the company was proud of providing
1bn doses to 170 countries, while 22.5 million people in the UK had received the vaccine.
Pharmaceutical company’s Australian chief points to mixed messaging as cause of AstraZeneca hesitancy
www.theguardian.com