The omicron variant increases the risk of complications during pregnancy


A international study in which they participated Vall d’Hebron Hospital in Barcelona and Lozano Blesa from Zaragoza showed that the pregnant They have one increased risk of complications due to infection with the omicron variant of covid and that the vaccination, especially with booster dose, East very effective in protection.

The project INTERCOVID 2022, coordinated by the University of Oxford (UK) and published in the The Lancet Magazine, was conducted in 41 hospitals in 18 countries assess the impact of the omicron variant of covid during pregnancy.

THE results reinforce what is already known since April 2021, when it was confirmed that the risk of complications increased in pregnant women infected with SARS-CoV-2, although this latest study provides evidence with data from infected with omicron and the vaccine effectiveness against this variant.

The researchers studied 1,545 pregnant women diagnosed with covid and 3,073 uninfected pregnant women, in a period between between November 2021 and June 2022, when omicron was predominant.

THE results showed that, during pregnancy, the omicron variant was associated with a increase in complications and of income in the hospital, good for symptomatology typical of covid (such as difficulty breathing) and due to effects on pregnancy.

Severe symptoms appeared in between 4% and 7% of unvaccinated women diagnosed with the omicron variant and was particularly high in obese or overweight women.

In particular, in women with severe symptoms, the risk of premature delivery and preeclampsia, which is the hypertension during pregnancy and which can cause serious harm to the pregnant woman and the baby.

On the other hand, the researchers observed that vaccination offered a high protection against severe symptoms Covid and facing pregnancy complications.

There efficiency of the vaccine was 74% in women with the complete vaccination schedule and has reached the 91% among those who had received a booster dose.

“It’s very solid information about the fact that, in pregnant women, vaccination reduces the risk of complications; protect them from excess prematurity and hypertensive complications, beyond the fact that it also protects the mother from ending up in intensive care due to respiratory complications, ”emphasized the specialist in the obstetrics department of Vall d’Hebron Nerea Maiz.

Thus, this study supports the recommendation vaccination with booster dose to all pregnant women It is indicated at any time of pregnancy as long as 10 months have passed since the last injection, Maiz detailed.

Regarding the type of immunization received, the mRNA vaccines (like those from Pfizer-BioNTech and Moderna) were more effective at preventing serious symptoms and complications for at least 10 months from the last dose.

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vaccines with viral vectors (such as those from AstraZeneca and Janssen) also offered adequate protection if a booster dose has been given.

Regarding the vaccination side effects, they have not been observed in the mother or in the fetus or neonate, even after having received the vaccine during pregnancy.

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