“Dr. Anan” reveals the results of foreign research. Repeated doses of old vaccines too often It will be more difficult to create a new immune system.
On January 29, Dr. Anan Chongkaewwatana, Director of Animal Health Innovation Research Group and Management Biotech-NSTDA. Post a message on Facebook. about repeated vaccination of the same strain with details that “This study was published by a research team in Shanghai. Data were collected from samples of people infected with COVID-19 strain BA.2 with different vaccination histories, i.e. those who had never been vaccinated. The group that received 2 doses of the killed vaccine and the group that received the 3-dose of the killed vaccine, with the result of at least 2 doses of vaccination on the severity of infection clearly showed that the group without immunity from the vaccine had symptoms. up to 33%, while the group with immunity from the vaccine, although not much, but enough to prevent severe symptoms very well because none of the subjects had severe symptoms in the study sample. The results of this experiment support that COVID Omicron that many people think is not serious. This is likely the result of a vaccine that immunizes during the time when the Omikron is going to spread in the human population. But this is unlikely because the virus has changed itself to become less severe.
Another interesting piece of information is The research team compared the immunity after BA.2 infection of each group. To see if the natural autoimmunity can be generated specifically for the omicron will be stimulated differently. The research team found that the group that produced the least amount of antibodies to Omicron after recovery was the group who received the three doses of vaccine, which was significantly less than the group who received the two doses. which such differences can be found only in the immunity of the omicron Because the immunity to the old species was not different between the groups.
The research team believes Repeated vaccination from old viruses causes the body to remember more and more of the old. When exposed to new material from the virus naturally, the body responds to the new material less and slower than the group who receives the vaccine less often (immune imprinting). This type of information has been published quite a lot and is not limited to a vaccine form. And it seems that repeating the same vaccination too often will be a problem for building immunity that is specific to new pathogens in nature, more and more difficult.
