Lot release volume of class I vaccines in China 2013-2020
In 2020, 350 million doses of class I vaccines were released in China. Although a slight increase from the previous two years, the number was still lower than the figures from before 2017. In China, class I vaccines are free and mandatory vaccines provided by the government, mainly aiming at preventing diseases among children. Hepatitis B vaccine is the most widely adopted class I vaccine type.