China News Service, Guangzhou, May 22 (Reporter Cai Minjie) The "Seminar on the Prevention and Control of Vaccine-Preventable Diseases under the New Crown Epidemic" hosted by the Guangdong Preventive Medicine Association was held online on the 21st.
Feng Zijian, executive vice president and secretary general of the Chinese Preventive Medicine Association, said at the meeting that it is urgent to increase the vaccination rate of new crowns among residents, especially the elderly.
Feng Zijian said that the Omi-Kron variant has strong transmission power, fast transmission speed, and a higher proportion of asymptomatic infection and mild disease; while there are continuous overseas imports, domestic-regional transmission has also become an important source of local transmission. The prevalence of Keron variants poses a greater challenge to my country's epidemic prevention and control, and also pays greater social and economic costs."
According to the demonstration opinions of the vaccine research and development special class, the combination of homologous booster immunization and inactivated vaccine-recombinant protein vaccine and inactivated vaccine-adenovirus vector vaccine, etc., can improve the neutralizing antibody level of the vaccinee.
Compared with young people, the elderly are at high risk of severe illness and death after infection with the new coronavirus, so it is more necessary to receive the new coronavirus vaccine and booster shots in time.
"The elderly in most developed countries have reached a very high vaccination rate, but there is still room for further improvement in the vaccination rate of new crown vaccines among people over 60 years old in my country, and the vaccination rate in some provinces is lower than 80%." Feng Zijian said that clinical trials have shown that inactivated vaccines are effective against The elderly have good safety, even better tolerance than other age groups, and the overall safety is very high.
Since March this year, many provinces across the country, including Guangdong, have launched booster vaccinations for the elderly, and it has been found that the effectiveness and safety of the basic immunization and booster immunization for the elderly are guaranteed.
"Elders who are in stable health condition should be vaccinated as soon as possible unless they are allergic to the vaccine or its components." Feng Zijian said.
In terms of the durability of protection, the study found that the effect of preventing hospitalization and severe illness remained at a high level after the booster immunization, but there were also signs of decline.
"So it is being studied, after the completion of the first booster immunization, especially for the elderly, chronic diseases and high-risk occupations, whether it is necessary to receive a 'fourth dose' booster immunization." Feng Zijian said.
(Finish)