• Live Coronavirus, Spain, today

  • Trial The Carlos III Institute initiates an 'express' study to see the effects of the combination of AstraZeneca and Pfizer vaccines

  • Health Experts recommend Health to complete the regimen with the second dose of AstraZeneca

Mixing vaccines against Covid-19 is safe and effective.

That is the conclusion reached by the

CombiVacs

study

, which the Carlos III Health Institute launched in mid-April.

The study, which

has analyzed the case of 600 people under 60 years of age

, aimed to find out the effects of giving a second dose of the Pfizer vaccine in individuals who had already received a first dose of AstraZeneca.

This express investigation was carried out after vaccination with AstraZeneca was discontinued in those under 60 years of age as its use was associated with very rare cases of thromboembolic problems.

It has not yet been defined what to do with the people who received a dose of AstraZeneca, although the Public Health Commission is scheduled to rule on the matter this Tuesday.

Raquel Yotti, director of the Carlos III Health Institute, pointed out during the presentation of the work, last April, that the purpose of the work was to collect scientific evidence to "

identify that the alternative of combining the two vaccines can be offered

. to the authorities and to Public Health to incorporate it into the vaccination strategy ".

The trial was carried out at the Clinico San Carlos and La Paz hospitals in Madrid;

Clinic and Vall d'Hebron in Barcelona and Hospital de Cruces de Vizcaya.

Of the 600 recruited volunteers, 400 completed their vaccination regimen with a booster dose of the Pfizer drug, while the rest acted as a control group.

The National Center for Microbiology has acted as the central laboratory for the assay.

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