A study done by Center for Disease Control and Prevention (CDC) of the United States, released on Wednesday (25/1), shows that vaccination against Covid-19 with updated booster doses of Pfizer or Moderna helped prevent almost half of symptomatic cases of the disease after infection by the XBB subvariant by Ômicron, the largest in circulation in the country.
This is one of the first studies to prove the effectiveness of bivalent vaccines in the real world. It shows that immunizations designed to offer greater protection against BA.4 and BA.5 subvariants worked similarly against XBB and XBB.1.5 infections.
The study was based on a review of Covid-19 cases registered in the country between December 1, 2022 and January 13, 2023.
It shows that the vaccine was 52% effective in preventing infections against BA.5 and 48% against XBB and XBB.1.5 among adults aged 18 to 49 years. Among the elderly, the effectiveness dropped to 37% and 43%, against the respective subvariants.
Copy of 3 Cards_Galeria_de_Fotos (14)Faced with the pandemic scenario and the expansion of the booster dose, some people are still wondering about the importance of the third dose of the vaccine against Covid-19stock
*** Vaccination of children against Covid-19The booster dose must be administered at least four months after the individual completes the initial vaccination schedule. The extra application serves to increase the amount of memory cells and further strengthen the antibodies they produce.Rafaela Felicciano/Metropolises
***Influenza flu vaccinationExperts point out that one of the main measures provided by the booster dose is the expansion of the immune response. The third dose causes an increase in the amount of antibodies circulating in the body, which reduces the chance of the immunized person getting sick.Tomaz Silva/Agência Brasil
***DF starts immunizing 12-year-olds and reinforces the vaccine for 80-year-oldsFor the elderly and immunosuppressed, the booster dose increases the effectiveness of immunization, since these groups do not develop an adequate immune responseHugo Barreto/Metropolises
***adult vaccineAnother important measure is to reduce the chance of infection in case of new variants. The antibody promoted by the vaccine is directed to the strain that gave rise to the formula and, in this process, people also produce antibodies that have diversity. The greater the reach of the proteins that defend the organism, the greater the probability that some will bind to the new variantWestend61/GettyImages
*** Vaccine against covid _ Coronavac _ butantanThe director of the Brazilian Society of Immunizations (SBIM) and member of the Technical Advisory Committee of the National Immunization Program of the Ministry of Health, Renato Kfouri says that the mixture of vaccines from different laboratories is a Rafaela Felicciano/Metropolises
***covid vaccine Increase in the number of covid-19 and Influenza cases in Brazil 6A study conducted by the University Hospital Southampton NHS Foundation Trust in the United Kingdom showed that people who received two doses of AstraZeneca had a 30-fold increase in antibody levels after a Moderna booster, and a 25-fold increase with a booster. pfizerArthur Menescal/Metrópoles Special
***Ticuna village _ indigenous people are vaccinated against covid-19 in the AmazonReactions to the booster dose are similar to the previous two doses. Mild to moderate symptoms such as excessive tiredness and pain at the injection site are expected. However, there are also reports of symptoms that include local redness or swelling, headache, muscle pain, chills, fever or nausea.Rafaela Felicciano/Metropolises
***With low demand, vaccination against H1N1 in Goiânia focuses on iIt is worth noting that the use of three doses has the main objective of reducing the number of severe cases and the number of hospitalizations due to Covid-19.Vinícius Schmidt/Metrópoles
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“Today we have additional evidence to show that these updated vaccines are protecting people against the latest variants of Covid-19,” Brendan Jackson, head of pandemic response, said at a news conference.
According to him, the data also show that the bivalent vaccine reduced the risk of death from Covid-19 by more than two times compared to vaccinated people who did not receive the updated booster and reduced the risk of death by approximately 13 times among those who did not. vaccinated.
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