Recently, the number of confirmed cases in China has "frequently exceeded 1,000", revealing that the epidemic prevention policy is gradually moving towards coexistence with the virus. However, people from all walks of life are worried that the protective power of the third dose will start to expire in June, and there have been voices calling for a "fourth dose". Commander Chen Shizhong also relented and will discuss the latest vaccine policy trends on the 20th. Is a "fourth dose" necessary? Israel, which is known for its "unique global" vaccine efficiency, pointed out through an observational study of 300,000 people that the fourth dose of the vaccine indeed has the effect of prolonging the protection and avoiding severe mortality for the elderly over 60 years old.
But in the long run, how long will vaccine protection last? Still unanswered questions. Israeli elders give "fourth dose" of vaccine, severe mortality and protection exposed unnamed Photo Credit: Tide Health The research team collected data from January 3 to February 18, 2022, when Israel was at the peak of the Omicron outbreak. The subjects were all elderly people over 60 years old, who had received the third dose T-Shirt Design
of BNT vaccine at least 4 months ago, and had no symptoms of COVID-19 confirmed by PCR screening. The research team looked at the protection provided by the following five fourth doses of BNT vaccine: PCR screening positive rate Symptomatic infection rate Hospitalization rate Severe rate mortality rate And on the seventh to 30th day and the 14th to 30th day after administration of the fourth dose,
the changes in antibody concentration and protective power were observed. In addition, variables such as age, sex, place of residence, and race were included in the assessment. The results showed that, of the 340,402 people who received the fourth dose of the vaccine, compared with the protection of the third dose, the protection from days seven to 30 was as follows: arrow_forward_ios了解更多 Powered byGliaStudio 1. PCR screening positive rate decreased by 44-47% 2. Symptomatic infection rate decreased by 53-58% 3. Hospitalization rate decreased by 59-74% 4. Severe disease rate decreased by 50-74% 5. Mortality rate decreased by 50-90% Is there a worry about the fourth dose of the vaccine? Expert: The protection is more short-term and may cause "immune paralysis"
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