COVID-19 | Vaccines protect against the Delta variant, but do not stop contagion within the home

The preparations against COVID-19 reduce the risk of infection with the Delta variant, but those immunized with the complete regimen can still transmit the virus to vaccinated and unvaccinated cohabitants, according to a study published in “The Lancet”.

This is demonstrated by an analysis carried out between September 2020 and 2021 in the United Kingdom with 621 participants as positive with mild disease or asymptomatic.

Likewise, the authors recorded demographic and vaccination information of those enrolled, as well as to detect covid, regardless of whether they presented symptoms or not.

It is, the researchers point out, one of the few studies developed so far that includes such a quantity of, which offers key information to know how those vaccinated with delta can still be infected and transmit this variant.

In this context, the experts identified a total of 205 domestic contacts of cases of the Delta variant, of which 53 tested positive for covid.

Of these 205 contacts, 62% (126) received two doses of a vaccine, 19% (39) had received one dose of a preparation, and

Among household contacts who were immunized with the full schedule, 25% (31 of 126) were infected with the Delta variant, compared with 38% (15 of 40) of unvaccinated household contacts.

”Vaccines are key to controlling the epidemic, as we know that they are very effective in preventing serious illness and deaths from covid. However, our results demonstrate that vaccination alone is not sufficient to prevent others from becoming infected with the Delta variant and ”explains Ajit Lalvani, from Imperial College London and a co-author of the study.

They also found, contributes, that the “Susceptibility to infection” had already increased a few months after the second dose of the vaccine, “So those with the right to they should receive them immediately ”.

The authors insist that, unlike the unvaccinated, those vaccinated with the full regimen present a lower risk – although still appreciable – of get infected with the Delta variant, while “They eliminate the infection more quickly.”

However, the peak of viral load among the vaccinated is similar to that of the unvaccinated, which could explain, they add, why those can still easily transmit the virus within the home.

Follow us on twitter: