China administers a billion vaccine doses
Chinese authorities aim to have fully vaccinated 40% of the country's 1.4 billion population by July. People in China are being offered domestically made Chinese vaccines, including the Sinopharm and Sinovac vaccines. Both require two doses.
However, the pace of vaccinations has rapidly increased and China's National Health Commission said it had taken just five days to administer the latest 100 million doses. An outbreak of the Delta variant in the southern province of Guangdong has also convinced some Chinese to be vaccinated.
The National Health Commission says it aims to have fully vaccinated 70% of the population by the end of the year. Three Chinese vaccines have been authorized for emergency use within the country. Two - the Sinopharm and Sinovac vaccines - have been approved for emergency use by the World Health Organization (WHO). They are both already in use in a range of other countries, including the Philippines, Chile, Brazil, Indonesia, Mexico, Thailand and Turkey.
The WHO said the Sinopharm vaccine's efficacy for symptomatic and hospitalized cases of Covid-19 was estimated to be 79%. It said the Sinovac vaccine prevented symptomatic disease in 51% of those vaccinated and prevented severe symptoms and hospitalization in 100% of samples.