China's hepatitis B vaccine vaccination rate dropped by 30%

April 25 is the 28th child immunization day, the theme of which is "vaccination, protection of health." However, the outbreak of the "Kangtai" hepatitis B vaccination incident four months ago has not eliminated the huge negative impact of the hepatitis B immunization strategy in China.

Li Quanle, director of the Department of Immunization of the Disease Control Bureau of the National Health and Family Planning Commission, said that after the hepatitis B vaccine incident, surveys in 10 provinces (autonomous regions and municipalities directly under the Central Government) showed that the reported rate of hepatitis B vaccine for children in China had dropped by 30%. After a lapse of 4 months, the hepatitis B vaccine vaccination rate rebounded, but the rate of recovery was slow and the process was difficult.

Hepatitis B vaccine is an important type of vaccine in the immunization program. Children born and residing in China within 24 hours of birth, 1 month of age, 6 months of age, and 1st grade of junior high school may be vaccinated at the nearest clinic. Free one dose of hepatitis B vaccine. According to the monitoring data from the Center for Immunization Planning of the Chinese Center for Disease Control and Prevention, since 2006, the coverage rate of hepatitis B vaccine in China has stabilized at about 98%.

At the end of last year, there were cases of infants and young children suspected of being vaccinated after the "Kangtai" hepatitis B vaccine. Although the government was finally confirmed by the government as being of acceptable quality, the public's confidence in domestically produced vaccines fell to the "freezing point."

Hepatitis B vaccination rate has stabilized at about 98%

In early January of this year, the China Center for Disease Control and Prevention conducted an emergency survey and assessment of 10 provinces (autonomous regions and municipalities directly under the Central Government) including Beijing, showing that in the past month, the hepatitis B vaccine vaccination rate dropped by about 30%. The rate of inoculation of 10 other vaccines such as measles, which is free for children, fell by an average of 15%.

Li Quanle said that for vaccination against communicable diseases, it is generally necessary to achieve a vaccination rate of over 90% in order to establish an effective immune barrier among the population; and for the effective prevention and control of acute infectious diseases such as measles, it requires the vaccination of measles vaccine. The rate should reach more than 95%.

The sudden drop in various vaccination rates may have led to the fall of the immune barrier in China against the major infectious diseases.

"If the above situation continues, there may be epidemics of vaccination against vaccinations in some areas, and the possibility of an outbreak may not be ruled out," said Wang Huaqing, deputy director of the Center for Immunization Planning at the China Center for Disease Control and Prevention in January this year.

Inoculation of abnormal reactions is intended to inform the public on a regular basis

To this end, the National Health and Family Planning Commission and the State Administration of Pharmacy and Drug Administration are discussing to regularly publish and analyze monitoring data on suspected abnormal reactions after China’s vaccination to the public, so that the public will realize that cases of abnormal reactions after vaccination will be long-term. Objective existence.

Among them, do not rule out the quality of the vaccine or accidents caused by inappropriate vaccination operations, but also include the heart reaction, the vaccine itself caused a small probability of adverse reactions and other diseases coupled. Specific reasons, for each specific case of severe abnormal reactions, there will be expert group traceability.

Li Quanle revealed that the analysis report of abnormal reactions after vaccination is expected to be released to the public during the year. The specific form, time, and specific content to be determined.

"The overall goal is to restore the public's confidence in domestic vaccines and prevent immunization, and stop the slide," Li Quanle said.

Inoculation abnormal reaction is less than infectious disease rate

According to Yu Wenzhou, deputy director of the CDC project office, the probability and loss of serious abnormal reactions after vaccination are much smaller than the risk of an outbreak of infectious diseases caused by people not vaccinating.

Before the measles vaccine was widely used, the incidence rate in some years was as high as 600/100,000, and the mortality rate of measles was very high. Even tens of thousands of children died of measles. After the measles vaccination rate in China has risen above 95%, the incidence of measles has dropped to 10/100,000 and the number of deaths is very small.

According to the China Surveillance System for Suspected Abnormal Reactions, the probability of an abnormal reaction after the immunization with measles vaccine is very low, and the incidence of severe abnormal reactions is within 1/100,000. The incidence of abnormal reactions after vaccination is far less than the incidence of infectious diseases caused by not being vaccinated, and the difference is even not comparable.