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The vaccination campaign is accelerating around the world and in Spain more than half of the entire population has the complete schedule and 66.6% have at least one dose administered, according to the latest data provided by the Ministry of health .
In a scenario in which the Delta variant advances throughout the country and is expected to become the predominant one at the end of August, Health has assured that “without a doubt” it will be necessary to be vaccinated annually against Covid- 19 and that there will be a souvenir dose.
In fact, in Israel they have already begun to inoculate a third dose of Pfizer to the most vulnerable groups and France has announced that from September it will immunize with a booster dose those people who were vaccinated before.
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In this sense, pharmaceutical companies are immersed in the study of a third dose of their formulas and Pfizer has already requested an emergency authorization from the Food and Drug Administration (FDA) to administer a third dose of reinforcement against the new variants .
Thus, the American pharmaceutical company announced this Wednesday that a third dose of its serum can “strongly boost” protection against the Delta variant, according to preliminary data from a study whose pre-print medRxiv has been published and which has not yet been subjected to peer review.
According to the results collected by the EFE Agency, this study suggests that a third dose can generate levels of antibodies against variant indica five times higher in people between 18 and 55 years and 11 times higher in people between 65 and 85 years of age .
A young man undergoes a PCR in Avilés, Asturias.
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In this way, the company ensures that a third dose could multiply the neutralizing response capacity against this mutation by 100 , although studies continue to evaluate its safety and efficacy.
Pfizer and its partner BioNTech already requested an authorization from the US FDA at the beginning of July to reinforce the immunization schedule with a third serum. In this first statement, the companies claimed that in their ongoing test, a third dose provided neutralizing antibodies five to 10 times higher six months after the administration of the second dose.