Which vaccine protects more against the Indian variant Delta: Pfizer, Moderna, AstraZeneca or Janssen

The greater transmissibility of the Delta variant of the coronavirus, widespread in India, worries European countries, which have begun to relax measures while the immunization campaign progresses. The current vaccines, except for Janssen, for which there is less information on the matter, provide good percentages of protection, but when the complete guideline is reached.

Pfizer and AstraZeneca vaccine against the Delta variant

The Covid-19 vaccines made by Pfizer and AstraZeneca are both highly effective against the new Indian variant of the coronavirus, offering 88% and 60% protection respectively, according to a study released today by Public Health England ( PHE). The effectiveness of these vaccines against the British variant, another of the most widespread, is 93% (Pfizer) and 63% (AstraZeneca).

Furthermore, both preparations provided 33% effectiveness against symptomatic disease against the Indian variant three weeks after the first dose, compared to approximately 50% against the British variant. According to these data, in the case of the AStraZeneca vaccine, more time is needed for the preparation to reach its maximum effectiveness.

Janssen and Modern vaccine against the Delta variant

Regarding the other two vaccines authorized in the European Union, there are no studies on their specific effectiveness with the Delta variant. However, results and preliminary work on the Moderna vaccine indicate that it offers a similar degree of effectiveness in all variants.

The effectiveness of the two doses against the Delta variant

Beyond the specific effectiveness of each vaccine against the Delta variant, the main message that the scientific community and the WHO are sending is that the highest degree of protection against strains is achieved with the complete immunization schedule, that is, after receiving the second dose. A message that coincides with the rebound in cases that the United Kingdom is registering, where more than 80% of the population has one dose and 58% has both.

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“The two doses of Pfizer or AstraZeneca are effective enough to control this variant, provide a good immune response and are effective in preventing hospitalization,” Ignacio López-Goñi, a microbiologist at the University of Navarra, explained to EFE. However, he notes that “some leakage of neutralizing antibodies has been detected at the experimental level, and less efficacy with a dose of vaccine,” adds López-Goñi, who emphasized the word “one.”

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