The following article comes from WEGZUDE German Circle, the author is youyou
Q1 After receiving two doses of inactivated vaccine, can I get the mRNA vaccine with the booster shot?
Family doctors suggest that if you have not received the mRNA vaccine, it is best to get vaccinated again. The booster shot needs to be in the same form as the first two shots. In other words, if you have been vaccinated in China, the booster shot can only be an inactivated vaccine. Otherwise, you have to get two more shots of the EU-approved mRNA vaccine (Pfizer/BioNTech or Moderna). Xiao Q received two doses of inactivated vaccine in China in February this year. After the 3G policy started, if he wanted to dine at an indoor restaurant in Munich, he was not allowed to bring a Chinese vaccination certificate. He needed to show that he had received the vaccination in Germany. Proof of two-dose mRNA vaccine.
Q2 How long is the interval between re-vaccination?
If you have already received two doses of the inactivated vaccine and want to be vaccinated with the mRNA vaccine again, for safety reasons, doctors recommend that the interval be at least half a year.
Xiao Q received two doses of inactivated vaccine in China in February this year, and now (September) can be vaccinated with the mRNA vaccine again.
Q3 Are there any side effects of mixed vaccinations?
Generally speaking, mixed vaccination refers to the first and second shots of vaccines from different manufacturers, such as BioNTech for the first shot and Moderna for the second shot.
If you have already received two doses of inactivated vaccine, and the interval is more than six months, there are no serious side effects from receiving the mRNA vaccine again. Basically, they are some common reactions after vaccination, such as soreness and fatigue at the vaccination site, which rarely occur. The conditions include: fever, swollen lymph nodes, etc. But these are normal immune responses.
Although there is currently no research to prove whether the mixed vaccine is more effective, judging from the actual situation, after vaccination with the domestic inactivated vaccine, the antibody titer produced in the body is low (the situation varies from person to person). If the mRNA vaccine is vaccinated again, Theoretically higher titers of antibodies will be produced. If you are not sure, you can check the antibody titer first, and then discuss with your family doctor whether to get vaccinated.
