Home » Delta variant: symptoms in vaccinated. Who it affects and how to cure it – breaking latest news

Delta variant: symptoms in vaccinated. Who it affects and how to cure it – breaking latest news

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Rome, July 24, 2021 – La Delta variant, formerly referred to as the Indian variant, is supplanting the English strain of Sars-Cov-2 virus in Europe. We know it is possible get infected also after vaccination, but what are the signs of infection and how do they manifest themselves in people who have already been vaccinated? Andrea Cossarizza, immunologist director of the Institute of General Pathology at the University of Modena, and like him other distinguished specialists have made it clear once and for all that vaccination protects against severe forms of Covid-19, but it is still possible to develop a form mild or asymptomatic. So, how it manifests itself e What can we do once contracted the disease despite all precautions taken?

The messenger RNA vaccines (type Pfizer and Modern) and those with live attenuated virus (type Astrazeneca oppure Janssen J&J) are able to block the way to the Delta variant, provided they have completed cycle a two doses (a single dose is enough in the case of Johnson & Johnson, which immediately develops long-term antibody memory), otherwise the immunization stops al 30%. Some scholars argue that it is necessary to take into account a possible loss of efficacy of the vaccine against the Indian variant, over the months, and that updated vaccines are being prepared. In the near future, with Novavax, subunit anti-Covid vaccines will also be available, i.e. made with protein fragments with immunogenic action, therefore able to promote individual immune defenses with a good degree of manageability, without having to resort to the chain of cold, limiting the risks of unwanted reactions.

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Vaccini, after Draghi boom in bookings

So what do we know about the Delta variant? In people vaccinate, usually the symptoms are mild, they may seem like those of ainfluenza, because the antibodies immediately enter into action and stop the multiplication of the virus in the bud in the mucous membranes of the upper respiratory tract. So we can have headache, lack of appetite, but physical prostration (weakness, asthenia) and loss of sensitivity to smells and tastes (anosmia, ageusia) are rarely reported, which are instead problems often present in people who contracted Coronavirus before anti-Covid prophylaxis was available.

Symptoms and after how long they appear

In the case of the Delta variant, two doses of Pfizer vaccine in the UK were found to be effective at88% in preventing symptomatic disease, against 93.7% of the Alpha variant. As for Astrazeneca, with two doses it was found to be del 67% compared to 74.5% of the Alfa.

The effectiveness after first and second dose

The Delta variant, being more contagious, attacks more easily the young people, who previously seemed less affected by the infection, and at the same time attacks more easily those who have had one first dose of vaccine, even if in the latter it is more difficult to take root thanks to the humoral immunity established. The data says that the Indian variant has a greater ability to bind to the receptor than the English variant and the Wuhan original. Variants arise when viruses replicate faster, these conditions occur more easily in rural areas, in South of the world, where prophylaxis is lacking. On the contrary, vaccinations block the transmission of viruses and prevent the formation of variants.

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Covid and children, few infections and almost never serious

The only chance we have to deal with the Delta variant, he stressed Walter Ricciardi, medical consultant hygienist of the ministry, is also vaccinate children and achieve 90% protection to have community immunity. Vaccination confers some protection against severe disease and Delta variant hospitalization, but in 30% -35% of cases it causes infection even in subjects who have completed the course with double vaccination, Ricciardi pointed out. By vaccinating us we avoid critical conditions, but infection is still possible: it must therefore be done testing and tracking. The need for these measures stems from the fact that the longer we hesitate, the more we allow the virus to select variants that pierce the vaccine.

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